Add documentation for Ice Lake processor family coreboot development.
Documented so far:
* What is Ice Lake
* Development Strategy
* Create coreboot Image
* Flashing coreboot
Change-Id: Ief4df6ca11f95b75ecddeb560f7887bfadced086
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/29805
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>