drm/amd/display: Make it more clear when info frames affect DP or HDMI

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>