[media] lirc_zilog: Deletion of unnecessary checks before vfree()

The vfree() function performs also input parameter validation. Thus the test
around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/staging/media/lirc/lirc_zilog.c

@@ -730,11 +730,9 @@ static int send_boot_data(struct IR_tx *tx)
 static void fw_unload_locked(void)
 {
 	if (tx_data) {
-		if (tx_data->code_sets)
-			vfree(tx_data->code_sets);
+		vfree(tx_data->code_sets);
 
-		if (tx_data->datap)
-			vfree(tx_data->datap);
+		vfree(tx_data->datap);
 
 		vfree(tx_data);
 		tx_data = NULL;