kms_vblank: Switch from using crtc0 statically to explicitly setting mode.

Previously crtc0 was statically used for VBLANK tests, but
that assumption is not valid for the VC4 platform.
Instead we're now explicitly setting the mode.

Also add support for testing all connected connectors during
the same test.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Signed-off-by: Marius Vlad <marius.c.vlad@intel.com>
1 file changed