net: phylink: introduce phylink_fwnode_phy_connect()

commit e81cfd0a28889a4c70006c42ee7ac1390d556d61 from
git://source.codeaurora.org/external/qoriq/qoriq-components/linux



Define phylink_fwnode_phy_connect() to connect phy specified by
a fwnode to a phylink instance.

Signed-off-by: Calvin Johnson <calvin.johnson@oss.nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Acked-by: Grant Likely <grant.likely@arm.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
(cherry picked from commit 732994f91926b7bfb82b654ce7b54030bfc7c85a)
Signed-off-by: Meng Li <Meng.Li@windriver.com>