UPSTREAM: drm/virtio: bump driver version after explicit synchronization addition

To reflect the (backward compatible) changes in the uabi we are bumping
the driver's version.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co>
Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20181112165157.32765-5-robert.foss@collabora.com


Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 6862965261a09fc459815ba38efb758fc88006df)
Signed-off-by: Greg Hartman <ghartman@google.com>
BUG: 139386237
Change-Id: I2bf6fa3700b6391e83a59007f98a128f89639557