[][openwrt][mt7988][tops][refactor tops-tool and add logger suuport]

[Description]
Refactor tops-tool and add logger support

add menu config for tops-tool
move common code into common part

save log cmd will open log relayfs and save
its data(log) as file in the filesystem

log relayfs path :
/sys/kernel/debug/tops/log-mgmt0
/sys/kernel/debug/tops/log-offload0

log file path :
<LOG_DIR>/log-mgmt-<time>
<LOG_DIR>/log-offload-<time>

[Release-log]
N/A

Change-Id: I1c563efbb584540eeb1b78c2a438c0173c4cdbba
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7988095
15 files changed