HM: Save/Load/Restore XCR0 handling during world switching. Implemented XSETBV for VT-x.
VMM: Retire VBOX_WITH_AUTO_MSR_LOAD_RESTORE define.
VMM: Removed all VBOX_WITH_OLD_[VTX|AMDV]_CODE bits.
build fix
VMM: HM bits.
VMM/VMMR0: debug build burn fix II.
header (C) fixes
VMM: HM cleanup.