Use UBaseType_t for ullMachineTimerCompareRegisterBase #2932

Job	Run time
CMake Example with Native GCC	17s
GNU ARM Toolchain	1m 44s
GCC MicroBlaze Toolchain	4m 6s
GNU MSP430 Toolchain	2m 1s
Native GCC (macos-latest)	2m 46s
WIN32 MingW	2m 48s
Native GCC (ubuntu-latest)	1m 19s
WIN32 MSVC	3m 2s
	18m 3s

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