[][Add check in setup macaddr flow to reject invalid macaddr]

[Description]
Add check in setup macaddr flow to reject invalid macaddr

[Release-log]
N/A

Change-Id: I1510727b62ffc3e00fb5bac0567872fb9498ac8e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4502696
1 file changed