drm/amd/display: Program ACP related register

- Setup the shift and mask of HDMI_ACP_SEND register
- Program the register in hdmi stream encoder
- Also update ACP register in azalia configuration

Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alan Liu <HaoPing.Liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>