small corrections

Initialize unitialized values for repeated calls

small fix inside ifdef z13mvc . (z13mvc code is not used in production)

Fixes #1432 (and possibly other DTRMM-related failures on Haswell and related architectures when built with cmake)

(Z13 ) Blas1 mikrokernels can be inlined by gcc. Refactoring,fixes,tunings

names). Some fixes and tunings

(Z systems Z13) small fixes, some (i(dz)amin,i(dz)amax,(dz)dot,(dz)asum) mikrokernels…

Address warnings #1357

Tag %1 and %2 as both input and output operands

fix from #1292 extended to the other gemv microkernels

Tag %1 and %2 as both input and output

Address few more warnings

The inline assembly modifies its input operands, so mark them as output to avoid surprises with optimization. Fixes #1292

related to issue #1332

The testcase from #1332 exposes a problem in daxpy_microk_haswell-2.c that is not seen with
any of the other Intel x86_64 microkernels.

* dead increments in driver/level2

* dead increments in kernel/generic

* part dead increments in kernel/x86_64

Add trivially optimized DSDOT for POWER8

Add optimized dsdot to all other x86_64 kernels that use sdot.c

Clean up spurious unused variables in the kernels

l2 cache size is not universally needed to assign default unrolling limits, but neither putting its declaration inside an ifdef nor cloning it into all ifdef sections that need it really makes sense here.