[PATCH V4 0/5] selftests/powerpc: Add NX-GZIP engine testcase

[Raphael Moreira Zinsly]

This patch series are intended to test the POWER9 Nest
Accelerator (NX) GZIP engine that is being introduced by
https://lists.ozlabs.org/pipermail/linuxppc-dev/2020-March/205659.html
More information about how to access the NX can be found in that patch,
also a complete userspace library and more documentation can be found at:
https://github.com/libnxz/power-gzip

Changes in V4:
	- Removed nx-helpers.h and moved relevant code to copy-paste.h.
	- Removed nx-gzip.h and symlinked the vas-api.h uapi instead.
	- Renamed inc to include and fixed warnings.
	- Proper integrated the code to the selftests Makefile system
	  with help from Michael Ellerman.


Thanks,
Raphael