DynamicTablesPkg: Fix assert in CmObject parser #521

Job	Run time
Analyze (ArmPkg, IA32,X64)	11m 56s
Analyze (CryptoPkg, IA32)	30m 32s
Analyze (CryptoPkg, X64)	33m 39s
Analyze (DynamicTablesPkg, IA32,X64)	13m 18s
Analyze (FatPkg, IA32,X64)	10m 20s
Analyze (FmpDevicePkg, IA32,X64)	19m 24s
Analyze (IntelFsp2Pkg, IA32,X64)	15m 52s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	18m 18s
Analyze (MdeModulePkg, IA32)	13m 9s
Analyze (MdeModulePkg, X64)	30m 7s
Analyze (MdePkg, IA32,X64)	20m 17s
Analyze (PcAtChipsetPkg, IA32,X64)	18m 4s
Analyze (PrmPkg, IA32,X64)	18m 17s
Analyze (SecurityPkg, IA32,X64)	21m 33s
Analyze (ShellPkg, IA32,X64)	20m 36s
Analyze (SourceLevelDebugPkg, IA32,X64)	18m 18s
Analyze (StandaloneMmPkg, IA32,X64)	18m 28s
Analyze (UefiCpuPkg, IA32,X64)	18m 28s
Analyze (UnitTestFrameworkPkg, IA32,X64)	19m 19s
	6h 9m 55s

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