staging: greybus: arche-platform: Format block comments.

Fix checkpatch warning:

WARNING: Block comments use a trailing */ on a separate line

Signed-off-by: Elise Lennion <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/greybus/arche-platform.c

···
 			goto exit;
 
 		/* First we want to make sure we power off everything
-		 * and then activate back again */
+		 * and then activate back again
+		 */
 		device_for_each_child(arche_pdata->dev, NULL, apb_poweroff);
 		arche_platform_poweroff_seq(arche_pdata);