drm/amd/display: Dpia hpd status not in sync after S4

drm/amd/display: Dpia hpd status not in sync after S4

[Why]
Dpia hpd status not in sync causing driver not enabling BW Alloc after
S4.

[How]
Update hpd_status of the link when querying hpd state from dmub in
dpia_query_hpd_status().

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>