drm/radeon: clean up sumo_rlc_init() for code sharing

This will eventually be shared with newer asics to
reduce code duplication.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -3910,6 +3910,7 @@ int sumo_rlc_init(struct radeon_device *rdev)
 	dws = rdev->rlc.reg_list_size;
 	cs_data = rdev->rlc.cs_data;
 
+	if (src_ptr) {
 		/* save restore block */
 		if (rdev->rlc.save_restore_obj == NULL) {
 			r = radeon_bo_create(rdev, dws * 4, PAGE_SIZE, true,
@@ -3933,6 +3934,7 @@ int sumo_rlc_init(struct radeon_device *rdev)
 			sumo_rlc_fini(rdev);
 			return r;
 		}
+
 		r = radeon_bo_kmap(rdev->rlc.save_restore_obj, (void **)&rdev->rlc.sr_ptr);
 		if (r) {
 			dev_warn(rdev->dev, "(%d) map RLC sr bo failed\n", r);
@@ -3959,7 +3961,9 @@ int sumo_rlc_init(struct radeon_device *rdev)
 
 		radeon_bo_kunmap(rdev->rlc.save_restore_obj);
 		radeon_bo_unreserve(rdev->rlc.save_restore_obj);
+	}
 
+	if (cs_data) {
 		/* clear state block */
 		reg_list_num = 0;
 		dws = 0;
@@ -3989,12 +3993,12 @@ int sumo_rlc_init(struct radeon_device *rdev)
 		r = radeon_bo_pin(rdev->rlc.clear_state_obj, RADEON_GEM_DOMAIN_VRAM,
 				  &rdev->rlc.clear_state_gpu_addr);
 		if (r) {
-
 			radeon_bo_unreserve(rdev->rlc.clear_state_obj);
 			dev_warn(rdev->dev, "(%d) pin RLC c bo failed\n", r);
 			sumo_rlc_fini(rdev);
 			return r;
 		}
+
 		r = radeon_bo_kmap(rdev->rlc.clear_state_obj, (void **)&rdev->rlc.cs_ptr);
 		if (r) {
 			dev_warn(rdev->dev, "(%d) map RLC c bo failed\n", r);
@@ -4035,6 +4039,7 @@ int sumo_rlc_init(struct radeon_device *rdev)
 
 		radeon_bo_kunmap(rdev->rlc.clear_state_obj);
 		radeon_bo_unreserve(rdev->rlc.clear_state_obj);
+	}
 
 	return 0;
 }