modesetting: Update props for dynamically added outputs

Dynamically added outputs should have their properties
properly updated as well. Otherwise we're left with an output
with many of its propeties not exposed.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Michel Dänzer <michel@daenzer.net>
3 jobs for dynamic_output_props in 6 minutes and 8 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Docker Image
passed #525399
debian-testing

00:00:38

 
  Build And Test
passed #525400
autotools-build-and-test

00:05:30

passed #525401
meson-build-and-test

00:01:31