Tolerate runtime service initialization failure

At present, the firmware panics if a runtime service fails to
initialize. An earlier patch had implemented late binding for all
runtime service handlers.

With that in place, this patch allows the firmware to proceed even when
a service fails to initialize.

Change-Id: I6cf4de2cecea9719f4cd48272a77cf459b080d4e

common/runtime_svc.c

@@ -119,24 +119,25 @@ void runtime_svc_init()
 			goto error;
 		}
 
+		/* Call the initialisation routine for this runtime service */
+		rc = rt_svc_descs[index].init();
+		if (rc) {
+			ERROR("Error initializing runtime service %s\n",
+					rt_svc_descs[index].name);
+		} else {
 			/*
-		 * Fill the indices corresponding to the start and end owning
-		 * entity numbers with the index of the descriptor which will
-		 * handle the SMCs for this owning entity range.
+			 * Fill the indices corresponding to the start and end
+			 * owning entity numbers with the index of the
+			 * descriptor which will handle the SMCs for this owning
+			 * entity range.
 			 */
 			start_idx = get_unique_oen(rt_svc_descs[index].start_oen,
 					rt_svc_descs[index].call_type);
 			end_idx = get_unique_oen(rt_svc_descs[index].end_oen,
 					rt_svc_descs[index].call_type);
+
 			for (; start_idx <= end_idx; start_idx++)
 				rt_svc_descs_indices[start_idx] = index;
-
-		/* Call the initialisation routine for this runtime service */
-		rc = rt_svc_descs[index].init();
-		if (rc) {
-			ERROR("Error initializing runtime service %s\n",
-					rt_svc_descs[index].name);
-			goto error;
 		}
 	}