* Made ncaGenerateEncryptedFsSectionBlock() entirely private. There's no point in keeping it public.
* Moved NCA FS section context initialization into its own function, ncaInitializeFsSectionContext().
* Hash data boundaries are now checked while initializing each NCA FS section context, using ncaFsSectionValidateHashDataBoundaries(). Both ncaValidateHierarchicalSha256Offsets() and ncaValidateHierarchicalIntegrityOffsets() have been removed.
* Improved hash region access detection in _ncaReadFsSection() by implementing ncaFsSectionCheckHashRegionAccess().
* ncaGetFsSectionHashTargetProperties() is now used in pfs.c, romfs.c and bktr.c to retrieve the properties from the target hash layer.
* Updated sanity checks in pfsInitializeContext(), romfsInitializeContext() and bktrInitializeContext().
