net: phy: air_en8811h: fix some error codes

These error paths accidentally return "ret" which is zero/success
instead of the correct error code.

Fixes: 71e7943 ("net: phy: air_en8811h: Add the Airoha EN8811H PHY driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>

drivers/net/phy/air_en8811h.c

@@ -272,11 +272,11 @@ static int __air_buckpbus_reg_read(struct phy_device *phydev,
 
 	pbus_data_high = __phy_read(phydev, AIR_BPBUS_RD_DATA_HIGH);
 	if (pbus_data_high < 0)
-		return ret;
+		return pbus_data_high;
 
 	pbus_data_low = __phy_read(phydev, AIR_BPBUS_RD_DATA_LOW);
 	if (pbus_data_low < 0)
-		return ret;
+		return pbus_data_low;
 
 	*pbus_data = pbus_data_low | (pbus_data_high << 16);
 	return 0;
@@ -323,11 +323,11 @@ static int __air_buckpbus_reg_modify(struct phy_device *phydev,
 
 	pbus_data_high = __phy_read(phydev, AIR_BPBUS_RD_DATA_HIGH);
 	if (pbus_data_high < 0)
-		return ret;
+		return pbus_data_high;
 
 	pbus_data_low = __phy_read(phydev, AIR_BPBUS_RD_DATA_LOW);
 	if (pbus_data_low < 0)
-		return ret;
+		return pbus_data_low;
 
 	pbus_data_old = pbus_data_low | (pbus_data_high << 16);
 	pbus_data_new = (pbus_data_old & ~mask) | set;