staging: lustre: Fix function declaration/definition mismatch

Fixes following Sparse errors.
lprocfs_status.c:1568:5: error: symbol 'lprocfs_wr_root_squash' redeclared with different type...
lprocfs_status.c:1632:5: error: symbol 'lprocfs_wr_nosquash_nids' redeclared with different type...

Signed-off-by: Sandeep Jain <sandeepjain.linux@gmail.com>
Acked-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lprocfs_status.h

@@ -703,9 +703,9 @@ static struct lustre_attr lustre_attr_##name = __ATTR(name, mode, show, store)
 extern const struct sysfs_ops lustre_sysfs_ops;
 
 struct root_squash_info;
-int lprocfs_wr_root_squash(const char *buffer, unsigned long count,
+int lprocfs_wr_root_squash(const char __user *buffer, unsigned long count,
 			   struct root_squash_info *squash, char *name);
-int lprocfs_wr_nosquash_nids(const char *buffer, unsigned long count,
+int lprocfs_wr_nosquash_nids(const char __user *buffer, unsigned long count,
 			     struct root_squash_info *squash, char *name);
 
 /* all quota proc functions */