net: mvneta: Disable fixed PHY code if PHY_FIXED is not compiled in

Guard the code handling the fixed PHY case by
CONFIG_IS_ENABLED(PHY_FIXED).

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/net/mvneta.c b/drivers/net/mvneta.c
index 378789b..292c364 100644
--- a/drivers/net/mvneta.c
+++ b/drivers/net/mvneta.c
@@ -812,7 +812,8 @@
 	mvreg_write(pp, MVNETA_SDMA_CONFIG, val);
 
 	/* Enable PHY polling in hardware if not in fixed-link mode */
-	if (pp->phydev->phy_id != PHY_FIXED_ID) {
+	if (!CONFIG_IS_ENABLED(PHY_FIXED) ||
+	    pp->phydev->phy_id != PHY_FIXED_ID) {
 		mvreg_write(pp, MVNETA_PHY_ADDR, pp->phydev->addr);
 
 		val = mvreg_read(pp, MVNETA_UNIT_CONTROL);
@@ -1172,7 +1173,8 @@
 		 * be added). Also, why is ADVERT_FC enabled if we don't enable
 		 * inband AN at all?
 		 */
-		if (pp->phydev->phy_id == PHY_FIXED_ID)
+		if (CONFIG_IS_ENABLED(PHY_FIXED) &&
+		    pp->phydev->phy_id == PHY_FIXED_ID)
 			val = MVNETA_GMAC_FORCE_LINK_UP |
 			      MVNETA_GMAC_IB_BYPASS_AN_EN |
 			      MVNETA_GMAC_SET_FC_EN |