[Why]
PSR Power on/off is done in PSR. Add a dc_debug option
and dmub setting to use PHY implementation of this instead.

[How]
Add a dc_debug option and dmub setting to use
PHY FSM Power up/down for PSR.
Co-authored-by: NShah Dharati <dharati.shah@amd.com>
Reviewed-by: NHansen Dsouza <hansen.dsouza@amd.com>
Acked-by: NAlan Liu <HaoPing.Liu@amd.com>
Signed-off-by: NShah Dharati <dharati.shah@amd.com>
Tested-by: NDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>