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

[Description]
fad06c23 [Critical][mt7988][SPI][Change SPI1 clk]
2b1f78b1 [kernel][mt7988][eth][Correct CDMA_HIGH_THRESHOLD setting]

[Release-log]

Change-Id: I48b2db4cc4c63b285f493772a399d730bdba3950
2 files changed