[coreboot] [PATCH]: Updated: Add the superio SMSC sch4304 support.

[Peter Stuge]

Bao, Zheng wrote:
> Add support of superio sch4304. 
> 
> The datasheet of the sch4304 doesnt seems to be public. So the patch
> should not be based on the information got from datasheet. Here is
> the result of superiotool.
> 
> bash# ./superiotool
> superiotool r4931
> Found SMSC SCH4307 (id=0x90, rev=0x03) at 0x2e
> 
> So we can know the Device id is 0x90. The sub-devices which I enabled
> are
> the ones whose LDNs don't change at all. So I believe it doesn't hurt
> anyone.
> 
> Maybe I am too sensitive, but I am not sure if the NDA is a problem
> here.
> 
> Signed-off-by: Zheng Bao <zheng.bao at amd.com>

Acked-by: Peter Stuge <peter at stuge.se>