[][MAC80211][WiFi6][misc][Add coredump support for MT7981]

[Description]
Add coredump support for MT7981
1. Default enable the kernel options of coredump

[Release-log]

Change-Id: I448db37b0d0840d35f8664c933624e53bbc334b6
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8239767
1 file changed