SYSLINK: ipc - fix the invalid comparision in sharedregion_add

This patch fixes the bug in sharedregion_add that does not allow
to add a second entry if the second entry's address is greater than
the first entry's address.

Minor status conversion statement added to nameserver_remotenotify
module to prevent the error in the shutdown phase of the MessageQ
sample.
Signed-off-by: Suman Anna <s-anna@ti.com>

drivers/dsp/syslink/multicore_ipc/nameserver_remotenotify.c

@@ -598,6 +598,8 @@ int nameserver_remotenotify_delete(void **rhandle)
 				obj->params.notify_event_no,
 				nameserver_remotenotify_callback,
 				(void *)obj);
+	if (retval == NOTIFY_SUCCESS)
+		retval = 0;
 	gate = obj->local_gate;
 	kfree(obj);
 	kfree(handle);

drivers/dsp/syslink/multicore_ipc/sharedregion.c

@@ -225,7 +225,8 @@ int sharedregion_add(u32 index, void *base, u32 len)
 				break;
 			}
 
-			if ((void *)((u32)base + len) >= entry->base) {
+			if ((base < entry->base) &&
+			(void *)((u32)base + len) >= entry->base) {
 				overlap = true;
 				break;
 			}