drm/amd/display: Promote DC to 3.2.378

drm/amd/display: Promote DC to 3.2.378

DC v3.2.378 summary:

New:
   - Add p-state schedule admissibility flags and frame-time utility

Fixes:
   - Fixed incorrect math_mod() result due to wrong variable in fmod implementation (Cc: stable)
   - Use overlay cursor when a color pipeline is active to avoid incorrect rendering
Cleanups:
   - Add const qualifiers to watermark params struct
   - Fix narrowing-conversion compiler warnings

Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>