MdeModulePkg/PlatformDriOverrideDxe: fix HiiOpCodeHandle leak #681

Job	Run time
Analyze (ArmPkg, IA32,X64)	4m 14s
Analyze (CryptoPkg, IA32)	16m 19s
Analyze (CryptoPkg, X64)	17m 47s
Analyze (DynamicTablesPkg, IA32,X64)	9m 25s
Analyze (FatPkg, IA32,X64)	10m 54s
Analyze (FmpDevicePkg, IA32,X64)	7m 19s
Analyze (IntelFsp2Pkg, IA32,X64)	10m 15s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	10m 10s
Analyze (MdeModulePkg, IA32)	11m 52s
Analyze (MdeModulePkg, X64)	14m 39s
Analyze (MdePkg, IA32,X64)	10m 52s
Analyze (PcAtChipsetPkg, IA32,X64)	10m 19s
Analyze (PrmPkg, IA32,X64)	9m 31s
Analyze (SecurityPkg, IA32,X64)	13m 53s
Analyze (ShellPkg, IA32,X64)	9m 22s
Analyze (SourceLevelDebugPkg, IA32,X64)	7m 5s
Analyze (StandaloneMmPkg, IA32,X64)	13m 0s
Analyze (UefiCpuPkg, IA32,X64)	15m 2s
Analyze (UnitTestFrameworkPkg, IA32,X64)	12m 54s
	3h 34m 52s

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