gpu-viv-bin-mx6q: remove useless build time deps

Since gpu-viv-bin-mx6q is provided as binary package, there is no build
time dependencies.

Tested-by: Gary Bisson <gary.bisson@boundarydevices.com>
Reviewed-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Jérôme Pouiller <jezz@sysmic.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>