gpu: drm: amd/radeon: Convert printk(KERN_<LEVEL> to pr_<level>

Use a more common logging style.

Miscellanea:

o Coalesce formats and realign arguments
o Neaten a few macros now using pr_<level>

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_test.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_test.c
index e05a243..b0483e6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_test.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_test.c
@@ -228,7 +228,7 @@
 out_cleanup:
 	kfree(gtt_obj);
 	if (r) {
-		printk(KERN_WARNING "Error while testing BO move.\n");
+		pr_warn("Error while testing BO move\n");
 	}
 }