add: timeouts for "lf read"

chg: change command consistency "lf t55xx rd" -> "lf t55xx read"
chg: buffer size used for armside is quite big. maybe to big. takes too long to read.

client/cmdlf.c

@@ -489,7 +489,12 @@ int CmdLFRead(const char *Cmd)
 	//And ship it to device
 	UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};
 	SendCommand(&c);
-	WaitForResponse(CMD_ACK,NULL);
+	//WaitForResponse(CMD_ACK,NULL);	
+	if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
+		PrintAndLog("command execution time out");
+		return 1;
+	}
+
 	return 0;
 }