drm/ttm: Use pr_fmt and pr_<level>

Use the more current logging style.

Add pr_fmt and remove the TTM_PFX uses.
Coalesce formats and align arguments.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/ttm/ttm_object.c b/drivers/gpu/drm/ttm/ttm_object.c
index 93577f2..68daca4 100644
--- a/drivers/gpu/drm/ttm/ttm_object.c
+++ b/drivers/gpu/drm/ttm/ttm_object.c
@@ -49,6 +49,8 @@
  * for fast lookup of ref objects given a base object.
  */
 
+#define pr_fmt(fmt) "[TTM] " fmt
+
 #include "ttm/ttm_object.h"
 #include "ttm/ttm_module.h"
 #include <linux/list.h>
@@ -232,8 +234,7 @@
 		return NULL;
 
 	if (tfile != base->tfile && !base->shareable) {
-		printk(KERN_ERR TTM_PFX
-		       "Attempted access of non-shareable object.\n");
+		pr_err("Attempted access of non-shareable object\n");
 		ttm_base_object_unref(&base);
 		return NULL;
 	}