staging: wilc1000: fix build warning with setup_timer()

I forgot to properly cast a pointer to unsigned long in a conversion to
setup_timer() which resulted in a build warning.  Fix that up.

Cc: Johnny Kim <johnny.kim@atmel.com>
Cc: Rachel Kim <rachel.kim@atmel.com>
Cc: Dean Lee <dean.lee@atmel.com>
Cc: Chris Park <chris.park@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/host_interface.c

@@ -6545,7 +6545,8 @@ s32 host_int_init(tstrWILC_WFIDrv **phWFIDrv)
 			s32Error = WILC_FAIL;
 			goto _fail_mq_;
 		}
-		setup_timer(&g_hPeriodicRSSI, GetPeriodicRSSI, pstrWFIDrv);
+		setup_timer(&g_hPeriodicRSSI, GetPeriodicRSSI,
+			    (unsigned long)pstrWFIDrv);
 		mod_timer(&g_hPeriodicRSSI, jiffies + msecs_to_jiffies(5000));
 	}