tests/kms_flip: Request the initial vbl count with RELATIVE instead of ABSOLUTE

Asking for the initial vblank count by specifying and absolute vblank count of 0
doesn't make much sense. Switch to a relative query instead.

v2: Drop the NEXTONMISS (Daniel)
v3: Put back the NEXTONMISS (Chris)

Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

tests/kms_flip.c

@@ -1105,7 +1105,7 @@ static void calibrate_ts(struct test_output *o, int crtc_idx)
 
 	memset(&wait, 0, sizeof(wait));
 	wait.request.type = kmstest_get_vbl_flag(crtc_idx);
-	wait.request.type |= DRM_VBLANK_ABSOLUTE | DRM_VBLANK_NEXTONMISS;
+	wait.request.type |= DRM_VBLANK_RELATIVE | DRM_VBLANK_NEXTONMISS;
 	do_or_die(drmWaitVBlank(drm_fd, &wait));
 
 	last_seq = wait.reply.sequence;