DK-TM4c129x CPU ENET clock issue

 Running CPU @ 120MHz UDP interface get online too few times approaching near a never sentence.

 Scaling speed down to 100MHz work every reset from debugger Push button or power cycle.

 Example of UDP is TIRTOS UDP_Echo IPV4

 On main I added this patch to scale down cpu clock, it never missed a dhcp acquisition nor packet echo.

http://e2e.ti.com/support/microcontrollers/tiva_arm/f/908/t/339014.aspx

// just after main clock structure

    xdc_runtime_Types_FreqHz cpuFreq;

// just before call board  init functions

    BIOS_getCpuFreq(&cpuFreq);
    cpuFreq.lo = 10*(cpuFreq.lo/12);
    BIOS_setCpuFreq(&cpuFreq);