LoongArch64: Add DYNAMIC_ARCH support

POWER: Enable bfloat16 kernels by default

This patch enables bfloat16 kernels by default for POWER processors.
Tested on Linux POWER8, POWER9, POWER10 and AIX POWER10 systems.

Add openblas_getaffinity() extension (Linux-only)

* fix detection of Neoverse V1 and user-enforced selection of N2

Neoverse N2: DYNAMIC_ARCH

Add c_check recognition of Fujitsu fcc for Fugaku A64FX

LoongArch64: Add core LOONGSON2K1000 and LOONGSONGENERIC

utest needs to be linked against libm on QNX as well

SPARC: fix DNRM2 returning INF instead of zero due to intermediate overflow

PPC6: Fix DNRM2 returning INF instead of zero due to intermediate overflow

Add back travis_wait to keep ppc jobs from getting cancelled

POWER: Fix complex dot function failures

POWER10: dgemv builtin rename

Fix dnrm2_tiny testcase failure

There are some test failures in complex dot functions when compiling with gcc12.
The machine constraints used now do not update all the four elements in the
expected result array. Fixing this with a reduced level of optimization.
This is not changing any performance numbers but will be converted to C code in future.

Add check to use correct builtin name for older versions
of gcc10 compilers.

Fix Fortran-less CTEST build option

Guard against sysconf(__SC_NPROCESSORS_CONF) returning zero at runtime

Eliminate uses of CREAL on left-hand side of assignments

Add DNRM2 regression test for issues 2998 and 3654

workaround ThunderX2 DNRM2 fault with ssq=inf,scale=0

sbgemm support for ARM Neoverse N2