drm/amd/display: Remove redundant checks for opp

The null checks for opp are redundant as they were already
dereferenced previously, as reported by Coverity; therefore
the null checks are removed.

This fixes 2 REVERSE_INULL issues reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/hwss/dcn10/dcn10_hwseq.c

@@ -1260,7 +1260,7 @@ void dcn10_plane_atomic_disconnect(struct dc *dc,
 	mpc->funcs->remove_mpcc(mpc, mpc_tree_params, mpcc_to_remove);
 	// Phantom pipes have OTG disabled by default, so MPCC_STATUS will never assert idle,
 	// so don't wait for MPCC_IDLE in the programming sequence
-	if (opp != NULL && dc_state_get_pipe_subvp_type(state, pipe_ctx) != SUBVP_PHANTOM)
+	if (dc_state_get_pipe_subvp_type(state, pipe_ctx) != SUBVP_PHANTOM)
 		opp->mpcc_disconnect_pending[pipe_ctx->plane_res.mpcc_inst] = true;
 
 	dc->optimized_required = true;

drivers/gpu/drm/amd/display/dc/hwss/dcn201/dcn201_hwseq.c

@@ -408,8 +408,7 @@ void dcn201_plane_atomic_disconnect(struct dc *dc,
 	if (mpcc_removed == false)
 		return;
 
-	if (opp != NULL)
-		opp->mpcc_disconnect_pending[pipe_ctx->plane_res.mpcc_inst] = true;
+	opp->mpcc_disconnect_pending[pipe_ctx->plane_res.mpcc_inst] = true;
 
 	dc->optimized_required = true;