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

[Description]
76cd4287 [mt7986][trng][change trng version]
37641870 [openwrt][mt7987][bsp][Add support for the mt7987 platform]
73fe5221 [kernel][mt7987][hnat][Refactor fqos flag assignment when HQoS is enabled for the NETSYSv3.1]
b4d8a1ed [kernel][common][eth][Add nf hw offload]
9872cf38 [kernel][mt7987][eth][Switch to real clock driver for the ETH]
e49e90e7 [set trng clock is ao]

[Release-log]

Change-Id: I47177c3ac8287a95f5bff802123e5bdb068fb009
23 files changed