drm/i915/jsl: Add W/A 1409054076 for JSL

drm/i915/jsl: Add W/A 1409054076 for JSL

When pipe A is disabled and MIPI DSI is enabled on pipe B,
the AMT KVMR feature will incorrectly see pipe A as enabled.
Set 0x42080 bit 23=1 before enabling DSI on pipe B and leave
it set while DSI is enabled on pipe B. No impact to setting
it all the time.

Changes since V5:
	- Added reviewed-by
	- Removed redundant braces and debug message format - Imre
Changes since V4:
        - Modified function comment Wa_<number>:icl,jsl,ehl - Lucas
        - Modified debug message in sync state - Imre
Changes since V3:
        - More meaningful name to workaround - Imre
        - Remove boolean check clear flag
        - Add WA_verify hook in dsi sync_state
Changes since V2:
        - Used REG_BIT, ignored pipe A and used sw state check - Jani
        - Made function wrapper - Jani
Changes since V1:
        - ./dim checkpatch errors addressed

Signed-off-by: Tejas Upadhyay <tejaskumarx.surendrakumar.upadhyay@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210615105613.851491-1-tejaskumarx.surendrakumar.upadhyay@intel.com