[][kernel][common][eth][Add NETSYSv3 new feature support]

[Description]
Add NETSYSv3 new feature support.

If without this patch, driver can't work on the NETSYSv3 hardware.

Patchset9: Add RSS supporting, and rename mtk_mac_link_state()
           to mtk_mac_pcs_get_state().
Patchset12: Add Signed-off.
Patchset15: Improve NETSYS stability.

[Release-log]
N/A

Change-Id: I095e0d39819448c9d2c18d2bb6e6d8065fc23d33
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6574066
10 files changed