net: ftgmac100: use setbits_le32() in the reset method

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c
index 67a7c73..78cd9df 100644
--- a/drivers/net/ftgmac100.c
+++ b/drivers/net/ftgmac100.c
@@ -331,7 +331,7 @@
 
 	debug("%s()\n", __func__);
 
-	writel(FTGMAC100_MACCR_SW_RST, &ftgmac100->maccr);
+	setbits_le32(&ftgmac100->maccr, FTGMAC100_MACCR_SW_RST);
 
 	while (readl(&ftgmac100->maccr) & FTGMAC100_MACCR_SW_RST)
 		;