[][openwrt][mt7988][crypto][Refactor xfrm packet mode path]

[Description]
Refactor xfrm packet mode path.
In previous version, for hw offloadable packets, we still use sw path to
encrypt/encap packets. After this commit, if a packet is offloadable,
crypto driver will send packet to tx. We don't need to go through rest
xfrm flow, so return directly.

[Release-log]
N/A


Change-Id: I51c0738a5fa7fcd3a775ab4d0086dc8646c991c3
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8135674
1 file changed