[][MAC80211][Change MT76 Makefile and add bersa support]

[Description]
Change MT76 Makefile and add bersa support

[Release-log]
N/A

Change-Id: Iecb0e9968c8e212a6ab92698c84d2e3a56dbd65b
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/5809192
213 files changed