net: cortina: Remove set but not used variable

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/cortina/gemini.c: In function gmac_get_ringparam:
drivers/net/ethernet/cortina/gemini.c:2125:21: warning: variable ‘config0’ set but not used [-Wunused-but-set-variable]

drivers/net/ethernet/cortina/gemini.c: In function gmac_init:
drivers/net/ethernet/cortina/gemini.c:512:6: warning: variable ‘val’ set but not used [-Wunused-but-set-variable]

these variable is never used, so remove it.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cortina/gemini.c

@@ -509,7 +509,6 @@ static int gmac_init(struct net_device *netdev)
 		.rel_threshold = 0,
 	} };
 	union gmac_config0 tmp;
-	u32 val;
 
 	config0.bits.max_len = gmac_pick_rx_max_len(netdev->mtu);
 	tmp.bits32 = readl(port->gmac_base + GMAC_CONFIG0);
@@ -519,7 +518,7 @@ static int gmac_init(struct net_device *netdev)
 	writel(config2.bits32, port->gmac_base + GMAC_CONFIG2);
 	writel(config3.bits32, port->gmac_base + GMAC_CONFIG3);
 
-	val = readl(port->dma_base + GMAC_AHB_WEIGHT_REG);
+	readl(port->dma_base + GMAC_AHB_WEIGHT_REG);
 	writel(ahb_weight.bits32, port->dma_base + GMAC_AHB_WEIGHT_REG);
 
 	writel(hw_weigh.bits32,
@@ -2107,9 +2106,8 @@ static void gmac_get_ringparam(struct net_device *netdev,
 			       struct ethtool_ringparam *rp)
 {
 	struct gemini_ethernet_port *port = netdev_priv(netdev);
-	union gmac_config0 config0;
 
-	config0.bits32 = readl(port->gmac_base + GMAC_CONFIG0);
+	readl(port->gmac_base + GMAC_CONFIG0);
 
 	rp->rx_max_pending = 1 << 15;
 	rp->rx_mini_max_pending = 0;