net: Move CONFIG_RTL8169 to Kconfig
Introduce CONFIG_RTL8169 in Kconfig and move over boards' defconfig
to use that.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Stephen Warren <swaren@nvidia.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>