drm/amd/display: Allow dirty rects to be sent to dmub when abm is active

drm/amd/display: Allow dirty rects to be sent to dmub when abm is active

[WHY]
It's beneficial for ABM to know when new frame data are available.

[HOW]
Add new condition to allow dirty rects to be sent to DMUB when ABM is
active. ABM will use this as a signal that a new frame has arrived.

Cc: Mario Limonciello <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: [email protected]
Reviewed-by: Anthony Koo <[email protected]>
Acked-by: Alex Hung <[email protected]>
Signed-off-by: Josip Pavic <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>