[][Add PCIe max link width adjustment feature]

[Description]
Add PCIe max link width adjustment feature.

[Release-log]
N/A

Change-Id: If4a7f53c8be8c6cf18b8febffd9fbfe88c743ff9
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7422117
1 file changed