The TP-Link EC330-G5u v1 router has MAC address that stored in factory mtd
in ascii format. This commit makes the router use of "mac-address-ascii"
in dts.
After the change:
1. All MAC addresses are explicitly assigned in dts (the workarounds in
network scripts are no longer needed);
2. gmac0 (eth0) MAC address is no longer random.
Signed-off-by: Mikhail Zhilkin <csharper2005@gmail.com>