[][kernel][common][Refactor network backport patch path]

[Description]
Refactor network backport patch path.

[Release-log]
N/A


Change-Id: Ic5069499cd8a491c3eaf7f2ab3b74f604f2885e5
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8696978
1 file changed