drm/vmwgfx: Fix OTABLE takedown

Don't fence and free the BO if command submission fails.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>

drivers/gpu/drm/vmwgfx/vmwgfx_mob.c

@@ -191,7 +191,9 @@ static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
 	if (unlikely(cmd == NULL)) {
 		DRM_ERROR("Failed reserving FIFO space for OTable "
 			  "takedown.\n");
-	} else {
+		return;
+	}
+ 
 	memset(cmd, 0, sizeof(*cmd));
 	cmd->header.id = SVGA_3D_CMD_SET_OTABLE_BASE;
 	cmd->header.size = sizeof(cmd->body);
@@ -201,7 +203,6 @@ static void vmw_takedown_otable_base(struct vmw_private *dev_priv,
 	cmd->body.validSizeInBytes = 0;
 	cmd->body.ptDepth = SVGA3D_MOBFMT_INVALID;
 	vmw_fifo_commit(dev_priv, sizeof(*cmd));
-	}
 
 	if (bo) {
 		int ret;