igt/kms_setmode: Clear all connectors before starting the test

Before we start trying random combinations of connectors and CRTCs, we
should first ensure we have a blank slate so that if we only change a
subset of the CRTC we do not conflict with a residual setup on the other
CRTC.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed