pps: pps_kc_hardpps_lock can be static

drivers/pps/kc.c:37:1: sparse: symbol 'pps_kc_hardpps_lock' was not declared. Should it be static?
drivers/pps/kc.c:39:19: sparse: symbol 'pps_kc_hardpps_dev' was not declared. Should it be static?
drivers/pps/kc.c:40:5: sparse: symbol 'pps_kc_hardpps_mode' was not declared. Should it be static?

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Cc: Rodolfo Giometti <giometti@enneenne.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/pps/kc.c

@@ -34,10 +34,10 @@
  */
 
 /* state variables to bind kernel consumer */
-DEFINE_SPINLOCK(pps_kc_hardpps_lock);
+static DEFINE_SPINLOCK(pps_kc_hardpps_lock);
 /* PPS API (RFC 2783): current source and mode for kernel consumer */
-struct pps_device *pps_kc_hardpps_dev;	/* unique pointer to device */
-int pps_kc_hardpps_mode;		/* mode bits for kernel consumer */
+static struct pps_device *pps_kc_hardpps_dev;	/* unique pointer to device */
+static int pps_kc_hardpps_mode;		/* mode bits for kernel consumer */
 
 /* pps_kc_bind - control PPS kernel consumer binding
  * @pps: the PPS source