The phy id is usually defined in lower case.
Signed-off-by: NFrank Sae <Frank.Sae@motor-comm.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230128063558.5850-2-Frank.Sae@motor-comm.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>