[ros-diffs] [ion] 23894: - Fix KTSS definition. - Add GetSegment inlines (ie: GetSs, GetDs, etc) - Fix up definition of KiBootGdt to use KGDTENTRY instead of USHORT. Also define KiGdtDescriptor using KDESCRIPTOR. - Remove GDT initialization code completely. The GDT is already initialized on boot. - Remove tss.c and add KiInitializeTss(2) to setup a TSS and proper IOPM/Interrupt Direction map settings for V86/VDM. - Copy the TSS code over but prettyify it to use NT/NDK structures instead of ugly USHORT typec