staging: rtl8712: Use linux/atomic.h instead of asm/atomic.h

Fixes warning from scripts/checkpatch.pl.
Signed-off-by: Michael Fiedler <michael.fiedler@informatik.stud.uni-erlangen.de>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8712/osdep_service.h

@@ -30,7 +30,7 @@
 #include <linux/circ_buf.h>
 #include <linux/uaccess.h>
 #include <asm/byteorder.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <linux/wireless.h>
 #include <linux/rtnetlink.h>
 #include "ethernet.h"