staging:ozwpan: Fixed trailing whitespace in ozpd.h

This patch fixes trailing whitespace error found in ozpd.h
Signed-off-by: Jelena Bjelja <jelena.bjelja.ing@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>

drivers/staging/ozwpan/ozpd.h

@@ -22,7 +22,7 @@
 #define OZ_TIMER_HEARTBEAT	2
 #define OZ_TIMER_STOP		3
 
-/* 
+/*
  *External spinlock variable
  */
 extern spinlock_t g_polling_lock;