lte-oftmodem '-M' commandline switch accepts new IP addresses of USRPs, and defaults to "192.168.10.2", if not specified.

    Changes: targets/RT/USER/lte-softmodem.c

        * All #ifdef ETHERNET has been removed so that option -M will set new IPs for USRP as well.
        * Line 367, 2552-2554: If USRP has been used, the IP defaults to 192.168.10.2

    Changes: targets/ARCH/USRP/USERSPACE/LIB/usrp_lib.cpp

        * Line 413-415, 424: Parse the IP to UHDlte-oftmodem '-M' commandline switch accepts new IP addresses of USRPs, and defaults to "192.168.10.2", if not specified.

changing LOG_E to LOG_W in rx_pucch_emul when UE is not found (this might happen during attach procedure but is ok since nothing will happen)