drm/virtio: don't leak bo on drm_gem_object_init failure

[ Upstream commit: 385aee965b4e4c36551c362a334378d2985b722a]

Change-Id: I1aa7337b422ed0f02e29c7ea3e537f7b0047126c
Git-repo: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git


Git-commit: 385aee965b4e4c36551c362a334378d2985b722a
Reported-by: 李强 <liqiang6-s@360.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170406155941.458-1-kraxel@redhat.com


Signed-off-by: Akshaya <akshayab@codeaurora.org>