arch/x86/ia32: Add option to reserve GDT entries

Some functions such as the ISH power management function needs to
reserve GDT entry place holders which are filled during runtime.
Add config option to define the number of GDT entry place holders
reserved and change the ia32 linker script accordingly.

Signed-off-by: Leifu Zhao <leifu.zhao@intel.com>
2 files changed