arcnet: Remove assignments from ifs

Move the assignment above the if like general kernel style.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
diff --git a/drivers/net/arcnet/com20020.c b/drivers/net/arcnet/com20020.c
index e813fc6..bea3862 100644
--- a/drivers/net/arcnet/com20020.c
+++ b/drivers/net/arcnet/com20020.c
@@ -140,7 +140,8 @@
 	outb(0 | RDDATAflag | AUTOINCflag, _ADDR_HI);
 	outb(0, _ADDR_LO);
 
-	if ((status = inb(_MEMDATA)) != TESTvalue) {
+	status = inb(_MEMDATA);
+	if (status != TESTvalue) {
 		arc_printk(D_NORMAL, dev, "Signature byte not found (%02Xh != D1h).\n",
 			   status);
 		return -ENODEV;