net: phy: micrel: simplify return in ksz9477_phy_errata()

net: phy: micrel: simplify return in ksz9477_phy_errata()

ksz9477_phy_errata function currently assigns the return value of
genphy_restart_aneg() to a variable and then immediately returns it

    err = genphy_restart_aneg(phydev);
    if (err)
        return err;

    return err;

This can be simplified by directly returning the function call
result, as the intermediate variable and conditional are redundant.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20251017193525.1457064-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>