[SeaBIOS] [PATCH v2] optionrom: disallow int19 redirect for pnp roms.

[Kevin O'Connor]

On Thu, Dec 06, 2018 at 04:07:40PM +0100, Gerd Hoffmann wrote:
> Check whenever pnp roms attempt to redirect int19, and in case it does
> log a message and undo the redirect.
> 
> A pnp rom should not need this, we have BEVs and BCVs for that.
> Nevertheless there are roms in the wild which are redirecting int19.
> At least some BIOS implementations for physical hardware have a config
> option in the setup to allow/disallow int19 redirections, so just not
> allowing this seems to be the way to deal with this situation.

Thanks.  As discussed, I'm okay with this change.

-Kevin