drm/radeon/kms: call r100_cp_disable rather than duplicating code.

r100_cp_fini was duplicating code of r100_cp_disable, call r100_cp_disable
instead.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 938a693..4e1c551 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -734,8 +734,7 @@
 		DRM_ERROR("Wait for CP idle timeout, shutting down CP.\n");
 	}
 	/* Disable ring */
-	rdev->cp.ready = false;
-	WREG32(RADEON_CP_CSQ_CNTL, 0);
+	r100_cp_disable(rdev);
 	radeon_ring_fini(rdev);
 	DRM_INFO("radeon: cp finalized\n");
 }