Fix for c_check misinterpreting arm64 in uname -m output as armv7

additionla fix for upcoming OSX on ARM64 related to #2804, as suggested by fxcoudert in #2805

Make NO_AVX512 option override the AVX512 compile test in CMAKE builds as well

ReLAPACK fixes

rebase

* Fix misnaming of LAPACK_?ggsvp and ?ggsvd function prototypes as LAPACKE_

* Drop the LAPACKE matrix_layout parameter from the argument lists, change ints to pointers and add missing work arguments.

Work around ARMV8 build-time cpu detection problems on non-Linux systems

POWER10: Avoid setting accumulators to zero in gemm kernels

For the first iteration, it is better to use xvf*ger instead of xvf*gerpp
builtins which helps to avoid setting accumulators to zero. This helps
to reduce few instructions.

Fix compile error on AIX cpuid detection

In 589c74a the cpuid detection was changed to use systemcfg, but a copy
and paste error was introduced during some refactoring that caused
POWER7 detection to reference CPUTYPE_POWER7 (which doesn't exist)
instead of CPUTYPE_POWER6.

Fix OMP num specify issue

Add aliases for armv6, armv7

FreeBSD uses those names for 32-bit ARM variants.

In current code, no matter what number of threads specified, all
available CPU count is used when invoking OMP, which leads to very bad
performance if the workload is small while all available CPUs are big.
Lots of time are wasted on inter-thread sync. Fix this issue by really
using the number specified by the variable 'num' from calling API.

Signed-off-by: Chen, Guobing <guobing.chen@intel.com>

Fix crashes in parallelized x86_64 ZDOT particularly on Windows

Add OpenMP dependency to pkgconfig information if needed

rebase

Enable COOPERLAKE build target

Move "direct SGEMM" functionality out of the SkylakeX SGEMM kernel and make it available
(on x86_64 targets only for now) in DYNAMIC_ARCH builds
* Add  sgemm_direct targets in the kernel Makefile.L3 and CMakeLists.txt
* Add direct_sgemm functions to the gotoblas struct in common_param.h
* Move sgemm_direct_performant helper to separate file
* Update gemm.c  to macros for sgemm_direct to support dynamic_arch naming via common_s,h
* (Conditionally) add sgemm_direct functions in setparam-ref.c

Do not require pkg-config to generate the *.pc file

Generating the pkg-config file does not actually depend on pkg-config being available.

Add fallback typedef for bfloat16 to openblas_config.h template

rebase