Use the new devm_of_phy_optional_get() helper instead of open-coding the
same operation.

As devm_of_phy_optional_get() returns NULL if either the PHY cannot be
found, or if support for the PHY framework is not enabled, it is no
longer needed to check for -ENODEV or -ENOSYS.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Sean Anderson <redacted>
---
v2:
  - Add Reviewed-by,
  - Clarify removed checks for -ENODEV and -ENOSYS,
  - Remove error printing in case of real failures.
---
 drivers/net/ethernet/freescale/fman/fman_memac.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fman/fman_memac.c b/drivers/net/ethernet/freescale/fman/fman_memac.c
index 9349f841bd0645a0..ddd9d13f1166e120 100644
--- a/drivers/net/ethernet/freescale/fman/fman_memac.c
+++ b/drivers/net/ethernet/freescale/fman/fman_memac.c

@@ -1152,13 +1152,12 @@ int memac_initialization(struct mac_device *mac_dev,
 	else
 		memac->sgmii_pcs = pcs;
 
-	memac->serdes = devm_of_phy_get(mac_dev->dev, mac_node, "serdes");
-	err = PTR_ERR(memac->serdes);
-	if (err == -ENODEV || err == -ENOSYS) {
+	memac->serdes = devm_of_phy_optional_get(mac_dev->dev, mac_node,
+						 "serdes");
+	if (!memac->serdes) {
 		dev_dbg(mac_dev->dev, "could not get (optional) serdes\n");
-		memac->serdes = NULL;
 	} else if (IS_ERR(memac->serdes)) {
-		dev_err_probe(mac_dev->dev, err, "could not get serdes\n");
+		err = PTR_ERR(memac->serdes);
 		goto _return_fm_mac_free;
 	}
 

-- 
2.34.1