drm/amd/display: remove psr state condition when psr exit case

[Why]
DMCU need to wait a vblank to handle psr enter command. When psr exit
coming before vblank, the psr exit command will be skip because current
psr state is disable.

[How]
remove psr state condition when psr exit case
Signed-off-by: Lewis Huang <Lewis.Huang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c

@@ -537,9 +537,6 @@ static void dcn10_dmcu_set_psr_enable(struct dmcu *dmcu, bool enable, bool wait)
 	if (dmcu->dmcu_state != DMCU_RUNNING)
 		return;
 
-	dcn10_get_dmcu_psr_state(dmcu, &psr_state);
-	if (psr_state == 0 && !enable)
-		return;
 	/* waitDMCUReadyForCmd */
 	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
 				dmcu_wait_reg_ready_interval,