MdeModulePkg/DxeCapsuleLibFmp: Fix crash with VirtualAddressMap omitted #17

Job	Run time
Analyze (ArmPkg, IA32,X64)	3m 38s
Analyze (CryptoPkg, IA32)	15m 42s
Analyze (CryptoPkg, X64)	16m 48s
Analyze (DynamicTablesPkg, IA32,X64)	4m 6s
Analyze (FatPkg, IA32,X64)	11m 14s
Analyze (FmpDevicePkg, IA32,X64)	11m 11s
Analyze (IntelFsp2Pkg, IA32,X64)	9m 38s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	9m 11s
Analyze (MdeModulePkg, IA32)	15m 57s
Analyze (MdeModulePkg, X64)	14m 56s
Analyze (MdePkg, IA32,X64)	11m 44s
Analyze (PcAtChipsetPkg, IA32,X64)	11m 32s
Analyze (PrmPkg, IA32,X64)	10m 14s
Analyze (SecurityPkg, IA32,X64)	12m 8s
Analyze (ShellPkg, IA32,X64)	11m 43s
Analyze (SourceLevelDebugPkg, IA32,X64)	9m 52s
Analyze (StandaloneMmPkg, IA32,X64)	9m 12s
Analyze (UefiCpuPkg, IA32,X64)	11m 38s
Analyze (UnitTestFrameworkPkg, IA32,X64)	9m 53s
	3h 30m 17s

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