[OpenSSL-1.0.2] TNF local patch - OPENSSL_rdtsc() uses non-atomic ops under 32bit PowerPC

[Takehiko NOZAKI]

original commit message:

http://mail-index.netbsd.org/source-changes/2012/07/27/msg036014.html

[Takehiko NOZAKI]

BUGFIX: Issue #163 - OPENSSL_rdtsc() uses non-atomic ops under 32bit PowerPC.

dist/crypto/ppccpuid.pl: don't read TBU, OPENSSL_rdtsc's return type is uint32_t and TBU is useless and discarded. lib/libcrypto/arch/powerpc{,64}/ppccpuid.S: regen and drop N local patch.

TODO: 1.0.2 doesn't support some evbppc's CPU(eg. e500v2) lacks mftb instruction. to support these cpu, rewrite some code using mfspr instruction and time base register=268.

this change taken from openssl's master branch(modified by me): https://github.com/openssl/openssl/commit/81eae077ce679c1d7d29e19991bf055e4888a2fc https://github.com/openssl/openssl/commit/c8f370485c43729db44b680e41e875ddd7f3108c

original commit message:

crpyto/ppccpuid.pl: add FPU probe and fix OPENSSL_rdtsc.

Reviewed-by: Kurt Roeckx [e-mail]

PPC: Try out if mftb works before using it

If this fails try out if mfspr268 works.

Use OPENSSL_ppccap=0x20 for enabling mftb, OPENSSL_ppccap=0x40 for enabling mfspr268, and OPENSSL_ppccap=0 for enabling neither.

Fixes #8012

Reviewed-by: Paul Dale [e-mail] (Merged from #8043)

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