Makefile.asm generated, and the tree committed, eight perlasm outputs
that neither libcrypto nor the kernel builds, and that upstream does
not build for these architectures with FreeBSD's configuration:
- aarch64: ecp_sm2p256-armv8, sm3-armv8, sm4-armv8, vpsm4-armv8 and vpsm4_ex-armv8. SM2, SM3 and SM4 are disabled (disable-sm2/sm3/sm4).
- i386: cast-586 (upstream's x86 configuration uses the C CAST code) and rc5-586 (RC5 is disabled by default).
- powerpc: aes-gcm-ppc. Upstream builds it only for 64-bit little-endian; libcrypto and ossl(4) use it only on powerpc64 and powerpc64le, whose copies stay.
Remove them from Makefile.asm and delete the generated files, so the
next vendor import does not regenerate them. If one of these algorithms
is ever enabled, add its script back to Makefile.asm and run "make
buildasm".