This adds to page on the x86 virtual memory about how to specify
extra page table mappings during build.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
As of today, Zephyr misses any kind of info page with overall
support status of ARC processors, their HW features and SW tools.
Fix that.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>