Revert "drm/amd/display: fix USB-C flag update after enc10 feature init"

This reverts commit b5abd7f9.

This change breaks DSC on 4k monitors at 144Hz over USB-C.

Closes: drm/amd#3254


Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Muhammad Ahmed <ahmed.ahmed@amd.com>
Cc: Tom Chung <chiahsuan.chung@amd.com>
Cc: Charlene Liu <charlene.liu@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: stable@vger.kernel.org