powerpc/bpf: Remove classical BPF support for PPC32

At the time being, PPC32 has Classical BPF support.

The test_bpf module exhibits some failure:

	test_bpf: torvalds#298 LD_IND byte frag jited:1 ret 202 != 66 FAIL (1 times)
	test_bpf: torvalds#299 LD_IND halfword frag jited:1 ret 51958 != 17220 FAIL (1 times)
	test_bpf: torvalds#301 LD_IND halfword mixed head/frag jited:1 ret 51958 != 1305 FAIL (1 times)
	test_bpf: torvalds#303 LD_ABS byte frag jited:1 ret 202 != 66 FAIL (1 times)
	test_bpf: torvalds#304 LD_ABS halfword frag jited:1 ret 51958 != 17220 FAIL (1 times)
	test_bpf: torvalds#306 LD_ABS halfword mixed head/frag jited:1 ret 51958 != 1305 FAIL (1 times)

	test_bpf: Summary: 371 PASSED, 7 FAILED, [119/366 JIT'ed]

Fixing this is not worth the effort. Instead, remove support for
classical BPF and prepare for adding Extended BPF support instead.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>

Author: chleroy

arch/powerpc/Kconfig

@@ -192,7 +192,6 @@ config PPC
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_C_RECORDMCOUNT
-	select HAVE_CBPF_JIT			if !PPC64
 	select HAVE_STACKPROTECTOR		if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
 	select HAVE_STACKPROTECTOR		if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
 	select HAVE_CONTEXT_TRACKING		if PPC64

arch/powerpc/net/Makefile

@@ -2,8 +2,4 @@
 #
 # Arch-specific network modules
 #
-ifdef CONFIG_PPC64
 obj-$(CONFIG_BPF_JIT) += bpf_jit_comp64.o
-else
-obj-$(CONFIG_BPF_JIT) += bpf_jit_asm.o bpf_jit_comp.o
-endif