[coreboot-gerrit] Patch merged into coreboot/master: mainboard: Clean up boot_option/reboot_bits in cmos.layout

the following patch was just integrated into master:
commit d23ee5de2233d2f200dc15bf4a7669599c2b2014
Author: Nico Huber 
Date:   Thu Aug 11 22:45:55 2016 +0200

mainboard: Clean up boot_option/reboot_bits in cmos.layout

Since commit 3bfd7cc (drivers/pc80: Rework normal / fallback selector
    code) the reboot counter stored in `reboot_bits` isn't reset on a reboot
    with `boot_option = 1` any more. Hence, with SKIP_MAX_REBOOT_CNT_CLEAR
    enabled, later stages (e.g. payload, OS) have to clear the counter too,
    when they want to switch to normal boot. So change the bits to (h)ex
    instead of (r)eserved.

To clarify their meaning, rename `reboot_bits` to `reboot_counter`. Also
    remove all occurences of the obsolete `last_boot` bit that have sneaked
    in again since 24391321 (mainboard: Remove last_boot NVRAM option).

Change-Id: Ib3fc38115ce951b75374e0d1347798b23db7243c
    Signed-off-by: Nico Huber 
    Reviewed-on: https://review.coreboot.org/16157
    Tested-by: build bot (Jenkins)
    Reviewed-by: Timothy Pearson 
    Reviewed-by: York Yang 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/16157 for details.

-gerrit