[PATCH 6/9] riscv: bpf: Move bpf_jit_alloc_exec() and bpf_jit_free_exec() to core

[Luke Nelson]

> We will drop the executable permissions of the code pages from the
> mapping at allocation time soon. Move bpf_jit_alloc_exec() and
> bpf_jit_free_exec() to bpf_jit_core.c so that they can be shared by
> both RV64I and RV32I.

Looks good to me.

Acked-by: Luke Nelson <luke.r.nels at gmail.com>