[][openwrt][mt7988][pce][TOPS Alpha release]

[Description]
Add alpha version of PCE(packet classification engine) package
The PCE supports packet classification HW features such as packet header,
partial user data and destination IP match. It also provides support to
setup HW crypto offload essential data.

[Release-log]
N/A

Change-Id: Ia1826dcc6e6969ef65bed6ae3a70ce761799a6b9
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7852682
17 files changed