mesa

This patch both adds support for probing & filtering DRM nodes
and switches away from using the GRALLOC_MODULE_PERFORM_GET_DRM_FD
gralloc call.

Currently the filtering is based just on the driver name,
and the desired name is supplied using the "drm.gpu.vendor_name"
Android property.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>