bpf: Enable BPF JIT on ppc32

[Denis Kirjanov]

This patch series enables BPF JIT on ppc32. There are relatevily
few chnages in the code to make it work.

All test_bpf tests passed both on 7447a and P2041-based machines.

Changelog:
v1 - > v2: Reordered Kconfig patch in the series

Denis Kirjanov (6):
      ppc: bpf: add required compatibility macros for jit
      ppc: bpf: add reqired opcodes for ppc32
      ppc: bpf: update jit to use compatibility macros
      ppc: bpf: rename bpf_jit_64.S to bpf_jit_asm.S
      ppc: bpf: Add SKF_AD_CPU for ppc32
      ppc: Kconfig: Enable BPF JIT on ppc32

 arch/powerpc/include/asm/asm-compat.h |   4 +
 arch/powerpc/include/asm/ppc-opcode.h |   2 +
 arch/powerpc/net/Makefile             |   2 +-
 arch/powerpc/net/bpf_jit.h            |  64 +++++++++-
 arch/powerpc/net/bpf_jit_64.S         | 229 ----------------------------------
 arch/powerpc/net/bpf_jit_asm.S        | 229 ++++++++++++++++++++++++++++++++++
 arch/powerpc/net/bpf_jit_comp.c       |  46 +++----
 7 files changed, 317 insertions(+), 259 deletions(-)