Patch merged into coreboot/master: arch/x86/assembly_entry: allow early post CAR stages to use common code

the following patch was just integrated into master:
commit aef586548a2443f40a49f9f1f5d99c522a89480f
Author: Aaron Durbin 
Date:   Fri Apr 29 12:34:01 2016 -0500

arch/x86/assembly_entry: allow early post CAR stages to use common code

The skylake-based Chromebooks use a separate verstage which runs
    just after bootblock and prior to romstage. The normal path for
    romstage would be to reload the gdt, however in the previously
    described scenario has verstage performing that work. Therefore,
    provide that path under those conditions. The only difference
    from the C_ENVIRONMENT_BOOTBLOCK scenario is that the stack
    should not be reloaded since there's no way to know the top
    of the stack.

Change-Id: Ic39ab52a856233d3042ac02a15ae4816ddfe07c7
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/14548
    Reviewed-by: Furquan Shaikh 
    Tested-by: build bot (Jenkins)
    Reviewed-by: Andrey Petrov 
    Reviewed-by: Leroy P Leahy

See https://review.coreboot.org/14548 for details.

-gerrit