UBIFS: use pr_ helper instead of printk

Use 'pr_err()' instead of 'printk(KERN_ERR', etc.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 46b8dd1..38230b1 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -150,7 +150,7 @@
 
 #define ubifs_assert(expr) do {                                                \
 	if (unlikely(!(expr))) {                                               \
-		printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
+		pr_crit("UBIFS assert failed in %s at %u (pid %d)\n",          \
 		       __func__, __LINE__, current->pid);                      \
 		dump_stack();                                                  \
 	}                                                                      \
@@ -159,7 +159,7 @@
 #define ubifs_assert_cmt_locked(c) do {                                        \
 	if (unlikely(down_write_trylock(&(c)->commit_sem))) {                  \
 		up_write(&(c)->commit_sem);                                    \
-		printk(KERN_CRIT "commit lock is not locked!\n");              \
+		pr_crit("commit lock is not locked!\n");                       \
 		ubifs_assert(0);                                               \
 	}                                                                      \
 } while (0)
@@ -178,7 +178,7 @@
 
 /* Just a debugging messages not related to any specific UBIFS subsystem */
 #define dbg_msg(fmt, ...)                                                      \
-	printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,   \
+	pr_err("UBIFS DBG (pid %d): %s: " fmt "\n", current->pid,              \
 	       __func__, ##__VA_ARGS__)
 
 /* General messages */