Transceiver: Remove unsigned negative compares

Change-Id: I49f30699786c52736ef334dae61f7bbd65d878d5
Fixes: Coverity CID 149353, 149356
diff --git a/Transceiver52M/osmo-trx.cpp b/Transceiver52M/osmo-trx.cpp
index 5e81586..b36c081 100644
--- a/Transceiver52M/osmo-trx.cpp
+++ b/Transceiver52M/osmo-trx.cpp
@@ -168,7 +168,7 @@
 	if (!config->chans)
 		config->chans = DEFAULT_CHANS;
 
-	if (config->mcbts && ((config->chans < 0) || (config->chans > 5))) {
+	if (config->mcbts && config->chans > 5) {
 		std::cout << "Unsupported number of channels" << std::endl;
 		return false;
 	}