Request for kernel sources.

[tang-yikai]

Hello, all.
I am using your image for my X96 X4 TV box for over 1 month, and I would give my appreciations to you, as you make it possible to make this device work.
And beyond the kernel image you give, I would like to build my own kernel to meet my own needs, like BPF support or something else.
I tested with the kernel-sources deb package you gave, it shows errors below.

make[2]: *** No rule to make target 'arch/arm64/tools/gen-cpucaps.awk', needed by 'arch/arm64/include/generated/asm/cpucap-defs.h'.  Stop.
make[1]: *** [arch/arm64/Makefile:196: archprepare] Error 2
make: *** [Makefile:248: __sub-make] Error 2