[JFFS2] Self-sufficient #includes in jffs2_fs_i.h: include <linux/mutex.h>

... instead of <linux/semaphore.h> which we don't need any more anyway.
Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

fs/jffs2/jffs2_fs_i.h

@@ -15,7 +15,7 @@
 #include <linux/version.h>
 #include <linux/rbtree.h>
 #include <linux/posix_acl.h>
-#include <linux/semaphore.h>
+#include <linux/mutex.h>
 
 struct jffs2_inode_info {
 	/* We need an internal mutex similar to inode->i_mutex.