[rdkb][common][bsp][Refactor and sync kernel from openwrt]

[Description]
0dd31333 [kernel][common][mt7988][Enable MIB read feature for the Aquantia PHY driver]
659abbdf [kernel][pinctrl][Backport pinconf setting combo mode]
02a6f8ff [kernel][pinctrl][Upgrade mt7988 pinconf setting using combo]

[Release-log]

Change-Id: I53e20e8fe8a768f6324a8a0fb13761a0a0987c0f
7 files changed