UPSTREAM: drm/virtio: add trace events for commands

Trace when commands are queued for both ctrlq and cursorq.  Trace
when responses are received for ctrlq.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190429220825.156644-3-olvaffe@gmail.com


Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 5daf8857c9909903348a1559586be8a09564089e)
Signed-off-by: Greg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: Ic24748031a4f42340d283ffaff64e88e0c04dc68