Fix arm64 32bit pcc for cpu-freq scaling #55
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This PR is to fix cpu frequency scaling in some arm64 platform
1): the current acpi_pcc.c do not handle for reg->BitWidth = 32 case,therefore some arm64 platform failed with Data aligment abort when init cppc
2): the current acpi_pcc.c mis-use mask when write new cpu freq into pcc channel
scale freq to 2500MHz

scale freq to 625MHz

before change the code, my ARM64 PC would failed to boot when acpi_cppc is enabled