ipq806x: ap3935: Use rgmii-id mode for LAN1
Fix issue with LAN1 interface on ap3935 devices, where the LAN
1interface won't come up after boot unless the bootloader has
initialized the network stack. Use of `fixed-link` in the prior code
kept the driver from clobbering PHY settings, but now that the driver
supports rgmii-id phy-mode, we can just use that.
Signed-off-by: Bryan Berg <bdb@north-eastham.org>
Link: https://github.com/openwrt/openwrt/pull/13629
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>