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

[Description]
Refactor network backport patch path.

[Release-log]
N/A


Change-Id: Ia982981d049a8ac03ef92c008e77e16e69b94a1e
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8449599
15 files changed