Jeff McGee authored Mar 12, 2015 and Daniel Vetter committed Mar 13, 2015

New test core_getparams consists of 2 subtests, each one testing
the ability of userspace to query the correct value of a GT config
attribute: subslice total or EU total. drm/i915 implementation of
these queries is required for Cherryview and Gen9+ devices (non-
simulated).

v2: Duplicate small amount of new libdrm functionality to avoid
    bumping libdrm version requirement (Daniel). Convert some
    igt_asserts to the appropriate comparison variants. Add a
    test description.
v3: Actually use the LOCAL GETPARAM defines. Otherwise can't build
    against older libdrm as intended by v2.

For: VIZ-4636
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>