fs/cachefiles: replace kerror by pr_err

Also add pr_fmt in internal.h

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index e47a8d8..584743d 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -146,7 +146,7 @@
 
 	if (ret < 0 && ret != -ETIMEDOUT) {
 		if (ret != -ENOBUFS)
-			pr_warn("CacheFiles: Lookup failed error %d\n", ret);
+			pr_warn("Lookup failed error %d\n", ret);
 		fscache_object_lookup_error(&object->fscache);
 	}