iris: Use DRM_IOCTL_I915_GEM_CREATE_EXT in all supported kernels
As we start to refactor the iris code base to support Xe KMD here I'm
dropping DRM_IOCTL_I915_GEM_CREATE usage as much as possible and
unifying all graphics memory allocation calls to
DRM_IOCTL_I915_GEM_CREATE_EXT.
The kernel version that implemented DRM_I915_QUERY_MEMORY_REGIONS uAPI
also implemented DRM_IOCTL_I915_GEM_CREATE_EXT so we can use that
to safely call DRM_IOCTL_I915_GEM_CREATE_EXT.
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21369>
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