staging: et131x: Fix et131x smatch issues

This fixes the following issues:

et131x_initpci.c +488 et131x_adjust_link(45) error: we previously assumed 'phydev' could be null.
et131x_initpci.c +504 et131x_adjust_link(61) warn: variable dereferenced before check 'phydev'
Signed-off-by: NMark Einon <mark.einon@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/staging/et131x/et131x_initpci.c

@@ -485,7 +485,7 @@ static void et131x_adjust_link(struct net_device *netdev)
 		et1310_config_mac_regs2(adapter);
 	}
 
-	if (phydev->link != adapter->link) {
+	if (phydev && phydev->link != adapter->link) {
 		/*
 		 * Check to see if we are in coma mode and if
 		 * so, disable it because we will not be able
@@ -501,7 +501,7 @@ static void et131x_adjust_link(struct net_device *netdev)
 			    "Link down - cable problem ?\n");
 			adapter->boot_coma = 0;
 
-			if (phydev && phydev->speed == SPEED_10) {
+			if (phydev->speed == SPEED_10) {
 				/* NOTE - Is there a way to query this without
 				 * TruePHY?
 				 * && TRU_QueryCoreType(adapter->hTruePhy, 0) ==