The udl kms driver writes messages to the syslog whenever some application
opens or closes /dev/fb0 and whenever the user switches between the
Xserver and the console.

This patch changes the priority of these messages to debug.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>