arch/arm/src/tiva: Add CC13xx logic to enable power domains needed by peripherals and to enable clocking to peripherals.
arch/arm/src/tiva: Rename some header files so that they are unique in order to avoid including the wrong file. Fix various compile issues found during some initial trial builds.
arch/arm/src/tiva: Add CC13xx clock enable and power enable macros that are backward compatible with lm/tm4c macros.
