ADD: lf cotag - added first try at basic functionality to read samples from Cotag. In lfops.c is the startup sequence that needs to be tested out.

armsrc/appmain.c

@@ -1009,6 +1009,9 @@ void UsbPacketReceived(uint8_t *packet, int len)
         case CMD_VIKING_CLONE_TAG:
 			CopyVikingtoT55xx(c->arg[0], c->arg[1], c->arg[2]);
             break;
+		case CMD_COTAG:
+			Cotag();
+			break;
 #endif
 
 #ifdef WITH_HITAG