net: phy: remove gen10g_no_soft_reset

genphy_no_soft_reset and gen10g_no_soft_reset are both the same no-ops,
one is enough.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>