remoteproc/omap: remove the mbox_callback limitation

Now that remoteproc supports any number of virtio devices,
the previous sanity check in omap_rproc_mbox_callback
doesn't make sense anymore.

Remove that so we can start supporting multiple vdevs.

Signed-off-by: Ohad Ben-Cohen <[e-mail]>
Cc: Brian Swetland <[e-mail]>
Cc: Iliyan Malchev <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Grant Likely <[e-mail]>
Cc: Rusty Russell <[e-mail]>
Cc: Mark Grosen <[e-mail]>
Cc: John Williams <[e-mail]>
Cc: Michal Simek <[e-mail]>
Cc: Loic PALLARDY <[e-mail]>
Cc: Ludovic BARRE <[e-mail]>
Cc: Omar Ramirez Luna <[e-mail]>
Cc: Guzman Lugo Fernando <[e-mail]>
Cc: Anna Suman <[e-mail]>
Cc: Clark Rob <[e-mail]>
Cc: Stephen Boyd <[e-mail]>
Cc: Saravana Kannan <[e-mail]>
Cc: David Brown <[e-mail]>
Cc: Kieran Bingham <[e-mail]>
Cc: Tony Lindgren <[e-mail]>

drivers/remoteproc/omap_remoteproc.c

···
 		dev_info(dev, "received echo reply from %s\n", name);
 		break;
 	default:
-		/* ignore vq indices which are too large to be valid */
-		if (msg >= 2) {
-			dev_warn(dev, "invalid mbox msg: 0x%x\n", msg);
-			break;
-		}
-
-		/*
-		 * At this point, 'msg' contains the index of the vring
-		 * which was just triggered.
-		 */
+		/* msg contains the index of the triggered vring */
 		if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)
 			dev_dbg(dev, "no message was found in vqid %d\n", msg);
 	}