[CIFS] fix typo

Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/cifsfs.h

@@ -101,5 +101,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 extern const struct export_operations cifs_export_ops;
 #endif /* EXPERIMENTAL */
 
-#define CIFS_VERSION   "1.5666666"
+#define CIFS_VERSION   "1.56"
 #endif				/* _CIFSFS_H */