Add devm_phy_optional_get and phy_optional_get, which should be used
when the phy is optional. They does not return an error when the phy
does not exist, rather they returns NULL, which is considered as a valid
phy, but results in NOPs when used with the consumer API.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>