ossl: split out x86 bits to x86/ossl_cpuid.c

[mhorne]

Summary

Make room for adding arm64 support to this driver by moving the
x86-specific feature parsing to a separate file.

[mhorne]

Move common ossl files to conf/files.

[jhb]

In general looks ok. My only wiggle is that right now sys/crypto/openssl/<arch> only contains generated files from OpenSSL (and is shared with the userland libcrypto build via .PATH). The other approach would be to call this new file 'sys/crypto/openssl/ossl_x86.c' and add it to SRCS.amd64 and SRCS.i386 explicitly. I'm not strictly tied to that approach however.

[mhorne]

In D27388#613044, @jhb wrote:

In general looks ok. My only wiggle is that right now sys/crypto/openssl/<arch> only contains generated files from OpenSSL (and is shared with the userland libcrypto build via .PATH). The other approach would be to call this new file 'sys/crypto/openssl/ossl_x86.c' and add it to SRCS.amd64 and SRCS.i386 explicitly. I'm not strictly tied to that approach however.

I see, it would be best kept out of that folder then. Naming it ossl_x86.c seems reasonable to me.

[mhorne]

Move x86/ossl_cpuid.c to ossl_x86.c.