arm: bpf_jit: remove modules dependence

bpf_jit doesn't seem to need modules dependence.
It doesn't build as a module either.
Replace the only two calls in bpf_jit_32.c to modules with direct calls to vmalloc.
This is only for arm, not tested for other architectures.

Change-Id: I59b1b0225e221943a9e219ee9025ea9b24487d6a