net: stmmac: simplify the return dwmac5_rxp_disable()

Simplify the return expression.
Signed-off-by: NZheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/dwmac5.c

@@ -305,17 +305,13 @@ int dwmac5_safety_feat_dump(struct stmmac_safety_stats *stats,
 static int dwmac5_rxp_disable(void __iomem *ioaddr)
 {
 	u32 val;
-	int ret;
 
 	val = readl(ioaddr + MTL_OPERATION_MODE);
 	val &= ~MTL_FRPE;
 	writel(val, ioaddr + MTL_OPERATION_MODE);
 
-	ret = readl_poll_timeout(ioaddr + MTL_RXP_CONTROL_STATUS, val,
+	return readl_poll_timeout(ioaddr + MTL_RXP_CONTROL_STATUS, val,
 			val & RXPI, 1, 10000);
-	if (ret)
-		return ret;
-	return 0;
 }
 
 static void dwmac5_rxp_enable(void __iomem *ioaddr)