switch vfs_mkdir() and ->mkdir() to umode_t

vfs_mkdir() gets int, but immediately drops everything that might not
fit into umode_t and that's the only caller of ->mkdir()...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/affs/affs.h b/fs/affs/affs.h
index c2b9c79..8abcad7 100644
--- a/fs/affs/affs.h
+++ b/fs/affs/affs.h
@@ -157,7 +157,7 @@
 extern struct dentry *affs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *);
 extern int	affs_unlink(struct inode *dir, struct dentry *dentry);
 extern int	affs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *);
-extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, int mode);
+extern int	affs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode);
 extern int	affs_rmdir(struct inode *dir, struct dentry *dentry);
 extern int	affs_link(struct dentry *olddentry, struct inode *dir,
 			  struct dentry *dentry);