[][MAC80211][ppe][Refactor PPE driver for backward compatible mt7622]

[Description]
Refactor PPE driver for backward compatible mt7622.

If without this patch, the MT7622's PPE can't bind the entries in the latest flowblock codebase.

[Release-log]
N/A

Change-Id: I1d4080ec413229e40dc3a46491a052da448e1dc9
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6409031
2 files changed