bcm63xx_enet: drop unneeded NULL phy_clk check

clk_disable and clk_unprepare are NULL-safe, so need to duplicate the
NULL check of the functions.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bcm63xx_enet.c

@@ -1903,7 +1903,6 @@ static int bcm_enet_probe(struct platform_device *pdev)
 out_uninit_hw:
 	/* turn off mdc clock */
 	enet_writel(priv, 0, ENET_MIISC_REG);
-	if (priv->phy_clk)
 	clk_disable_unprepare(priv->phy_clk);
 
 out_disable_clk_mac:
@@ -1943,9 +1942,7 @@ static int bcm_enet_remove(struct platform_device *pdev)
 	}
 
 	/* disable hw block clocks */
-	if (priv->phy_clk)
 	clk_disable_unprepare(priv->phy_clk);
-
 	clk_disable_unprepare(priv->mac_clk);
 
 	free_netdev(dev);