intel_audio_dump/hsw: remove misuse of PCH transcoder configuration register

intel_audio_dump/hsw: remove misuse of PCH transcoder configuration register

The PCH transcoder config register (PCH_TRANS_CONF, 0xf0008) is not the
correct config register for transcoder A, B or C. This register is in
PCH and for CRT display, nothing to do with display audio.

So This patch removes misuse of it as config register for transcoder A/B/C.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Reviewed-by: Haihao Xiang <haihao.xiang@intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>