machines: phyimx6qdl: purge vivante in favour of mesa
machines: phyimx6qdl: purge vivante in favour of mesa

This patch drops imxgpu3d support in favour of gallium3d mesa support.

Signed-off-by: Christoph Fritz <3f93e2eb5fbf7dff6d2527b5025d7d12c7de488b@fritzc.com>
Keep vpu firmaware
Signed-off-by: Stefan Müller-Klieser <a3e08e35e4a42be768e7d0e76ae1ba321c2a66dd@phytec.de>

PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec,PHYTEC-Messtechnik-GmbH/meta-phytec