linux-phytec-ti

net: keystone: add support of keystone common serdes phy driver for gbe

Prior to this patch, gbe inherits the SerDes configurations from
u-boot.  This patch updates the Keystone ethernet driver to use the
generic Keystone serdes phy driver for serdes initialization
and configuration.  The common serdes phy driver supports peripherals
on Keystone platforms that require serdes namely 1GBE, 10GBE, PCIE,
and SRIO. This also replace the netcp_xgbepcsr.c for 10GBE and is
thus removed as part of this patch. While at it, add an example bindings
for 10GBE using the new phy driver and also remove commented properties
from the example bindings.

Signed-off-by: WingMan Kwok <w-kwok2@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>