[SeaBIOS] [PATCH for-1.10-stable] drop "etc/boot-cpus" fw_cfg file and reuse legacy QEMU_CFG_NB_CPUS

[Gerd Hoffmann]

  Hi,

> > QEMU part has been merged to master:
> >  e3cadac07 pc: fix FW_CFG_NB_CPUS to account for -device added CPUs
> > 
> > Gerd,
> > Could you take care about applying this patch to SeaBIOS (+stable)
> > and updating SeaBIOS blob and QEMU?
> 
> FYI, I committed this change to the SeaBIOS master branch.

1.10-stable branch created, patch cherry-picked.  Given that there isn't
much else yet in master I'll go tag rel-1.10.1 with only that patch
tomorrow, in case there are any objections please speak up now.

cheers,
  Gerd