ArmPkg: Update Generic Watchdog PCD Type #7290

Job	Run time
Analyze (ArmPkg, IA32,X64)	3m 48s
Analyze (CryptoPkg, IA32)	15m 17s
Analyze (CryptoPkg, X64)	17m 44s
Analyze (DynamicTablesPkg, IA32,X64)	9m 2s
Analyze (FatPkg, IA32,X64)	8m 57s
Analyze (FmpDevicePkg, IA32,X64)	6m 41s
Analyze (IntelFsp2Pkg, IA32,X64)	8m 31s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	9m 59s
Analyze (MdeModulePkg, IA32)	12m 45s
Analyze (MdeModulePkg, X64)	16m 11s
Analyze (MdePkg, IA32,X64)	10m 59s
Analyze (PcAtChipsetPkg, IA32,X64)	6m 38s
Analyze (PrmPkg, IA32,X64)	11m 16s
Analyze (SecurityPkg, IA32,X64)	12m 12s
Analyze (ShellPkg, IA32,X64)	9m 27s
Analyze (SourceLevelDebugPkg, IA32,X64)	9m 9s
Analyze (StandaloneMmPkg, IA32,X64)	10m 23s
Analyze (UefiCpuPkg, IA32,X64)	12m 29s
Analyze (UnitTestFrameworkPkg, IA32,X64)	10m 12s
	3h 21m 40s

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