PcAtChipsetPkg: Fix AcpiTimerLib incompatibility with XhciDxe #32

Job	Run time
Analyze (ArmPkg, IA32,X64)	5m 24s
Analyze (CryptoPkg, IA32)	15m 54s
Analyze (CryptoPkg, X64)	16m 42s
Analyze (DynamicTablesPkg, IA32,X64)	3m 42s
Analyze (FatPkg, IA32,X64)	9m 42s
Analyze (FmpDevicePkg, IA32,X64)	10m 1s
Analyze (IntelFsp2Pkg, IA32,X64)	8m 16s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	7m 31s
Analyze (MdeModulePkg, IA32)	17m 19s
Analyze (MdeModulePkg, X64)	16m 34s
Analyze (MdePkg, IA32,X64)	13m 57s
Analyze (PcAtChipsetPkg, IA32,X64)	8m 46s
Analyze (PrmPkg, IA32,X64)	12m 39s
Analyze (SecurityPkg, IA32,X64)	12m 55s
Analyze (ShellPkg, IA32,X64)	12m 31s
Analyze (SourceLevelDebugPkg, IA32,X64)	8m 8s
Analyze (StandaloneMmPkg, IA32,X64)	8m 19s
Analyze (UefiCpuPkg, IA32,X64)	13m 46s
Analyze (UnitTestFrameworkPkg, IA32,X64)	7m 7s
	3h 29m 13s

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