drm/radeon: write gfx pg bases even when gfx pg is disabled

For consistency.  These buffers aren't used when pg is
disabled.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/si.c

@@ -5488,6 +5488,9 @@ static void si_init_pg(struct radeon_device *rdev)
 		si_init_ao_cu_mask(rdev);
 		if (rdev->pg_flags & RADEON_PG_SUPPORT_GFX_PG) {
 			si_init_gfx_cgpg(rdev);
+		} else {
+			WREG32(RLC_SAVE_AND_RESTORE_BASE, rdev->rlc.save_restore_gpu_addr >> 8);
+			WREG32(RLC_CLEAR_STATE_RESTORE_BASE, rdev->rlc.clear_state_gpu_addr >> 8);
 		}
 		si_enable_dma_pg(rdev, true);
 		si_enable_gfx_cgpg(rdev, true);