[][openwrt][common][bsp][Reorganize files]

[Description]
Change the organization of file and patches to follow the rules of the
next gen autobuild framework.

[Release-log]
N/A

Change-Id: I61a85c4e2fdb0bac45ad53f138298e51768910af
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8513568
1064 files changed