drm/amd/display/dc/dce110/dce110_timing_generator: Demote kernel-doc abuses to standa...

drm/amd/display/dc/dce110/dce110_timing_generator: Demote kernel-doc abuses to standard function headers

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:79: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:124: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_enable_crtc'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:179: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:233: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_disable_crtc'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:258: warning: Function parameter or member 'tg' not described in 'program_horz_count_by_2'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:258: warning: Function parameter or member 'timing' not described in 'program_horz_count_by_2'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:284: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_program_timing_generator'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:284: warning: Function parameter or member 'dc_crtc_timing' not described in 'dce110_timing_generator_program_timing_generator'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:356: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:525: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:561: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1118: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_validate_timing'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1118: warning: Function parameter or member 'timing' not described in 'dce110_timing_generator_validate_timing'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1118: warning: Function parameter or member 'signal' not described in 'dce110_timing_generator_validate_timing'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1174: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_wait_for_vblank'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1198: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_wait_for_vactive'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1208: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1386: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1768: warning: Cannot understand  *****************************************************************************
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1801: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_disable_vga'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1851: warning: Function parameter or member 'tg' not described in 'dce110_timing_generator_set_overscan_color_black'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1851: warning: Function parameter or member 'color' not described in 'dce110_timing_generator_set_overscan_color_black'
 drivers/gpu/drm/amd/amdgpu/../display/dc/dce110/dce110_timing_generator.c:1851: warning: Excess function parameter 'param' description in 'dce110_timing_generator_set_overscan_color_black'

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Anthony Koo <Anthony.Koo@amd.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>