common: Drop linux/printk.h from common header

This old patch was marked as deferred. Bring it back to life, to continue
towards the removal of common.h

Move this out of the common header and include it only where needed.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 0ecc2e0..d8324ae 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -12,6 +12,7 @@
 #define __UBIFS_DEBUG_H__
 
 /* Checking helper functions */
+#include <linux/printk.h>
 typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
 				 struct ubifs_zbranch *zbr, void *priv);
 typedef int (*dbg_znode_callback)(struct ubifs_info *c,