mainboard/dell: Add new mainboard XPS 8300 (Sandy Bridge)

Mainboard is identified as 0Y2MRG.
The version tested is with Nvidia dGPU (gfx 560ti).

The flash is a 4MiB Winbond W25Q32BVSIG.
It can be flashed internally with flashrom.
Add a strap on the service mode pin of the mainboard for internal flash.

Tested working:
- SeaBIOS
- All USB ports
- SATA
- dGPU
- Ethernet
- Environment control
- GPIOs
- S3 Sleep mode
- WakeOnLan

Change-Id: I7d394794fec580bc7aed3f6396ceb47d4a6fd059
Signed-off-by: Ronald Claveau <sousmangoosta@aliel.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83104
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

0 files changed, 0 insertions, 0 deletions