drm/amd/display: Passing Y-granularity to dmub fw

[Why]
The Y-granularity panel parameter indicate the grid
pattern granularity in the Y direction for PSRSU.

[How]
Send the Y-granularity data by PSR_COPY_SETTINGS dmub command.

Signed-off-by: David Zhang <dingchen.zhang@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>