staging: rtl8712: Remove NULL check before kfree

This patch was generated by the following semantic patch:
// <smpl>
@@ expression E; @@
- if (E != NULL) { kfree(E); }
+ kfree(E);

@@ expression E; @@
- if (E != NULL) { kfree(E); E = NULL; }
+ kfree(E);
+ E = NULL;
// </smpl>

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/rtl8712/rtl871x_ioctl_linux.c

@@ -1873,8 +1873,7 @@ static int r871x_mp_ioctl_hdl(struct net_device *dev,
 		goto _r871x_mp_ioctl_hdl_exit;
 	}
 _r871x_mp_ioctl_hdl_exit:
-	if (pparmbuf != NULL)
-		kfree(pparmbuf);
+	kfree(pparmbuf);
 	return ret;
 }