protocol_splitter: reduce poll timeout from 100ms to 10ms

This matches the timeout in mavlink_receiver.
With the higher timeout sending of e.g. mavlink logging was done at a lower
rate.

src/drivers/protocol_splitter/protocol_splitter.cpp

@@ -358,7 +358,7 @@ pollevent_t DevCommon::poll_state(struct file *filp)
 	 * the _fd in here or by overriding some other method.
 	 */
 
-	::poll(fds, sizeof(fds) / sizeof(fds[0]), 100);
+	::poll(fds, sizeof(fds) / sizeof(fds[0]), 10);
 
 	return POLLIN;
 }