NetworkPkg/UefiPxeBcDxe: Bugfix for pxe driver #7407

Job	Run time
Analyze (ArmPkg, IA32,X64)	4m 38s
Analyze (CryptoPkg, IA32)	17m 6s
Analyze (CryptoPkg, X64)	18m 14s
Analyze (DynamicTablesPkg, IA32,X64)	7m 3s
Analyze (FatPkg, IA32,X64)	11m 43s
Analyze (FmpDevicePkg, IA32,X64)	11m 19s
Analyze (IntelFsp2Pkg, IA32,X64)	9m 48s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	10m 13s
Analyze (MdeModulePkg, IA32)	15m 10s
Analyze (MdeModulePkg, X64)	14m 22s
Analyze (MdePkg, IA32,X64)	12m 8s
Analyze (PcAtChipsetPkg, IA32,X64)	9m 52s
Analyze (PrmPkg, IA32,X64)	9m 17s
Analyze (SecurityPkg, IA32,X64)	13m 8s
Analyze (ShellPkg, IA32,X64)	12m 49s
Analyze (SourceLevelDebugPkg, IA32,X64)	11m 14s
Analyze (StandaloneMmPkg, IA32,X64)	8m 24s
Analyze (UefiCpuPkg, IA32,X64)	12m 49s
Analyze (UnitTestFrameworkPkg, IA32,X64)	9m 43s
	3h 39m 0s

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