[coreboot] AMD Serengeti Cheetah devices

[Myles Watson]

Fix the amd8111. 

Remove the device struct for amd8111.c as it is not a device. 

Make sure that the phase4_enable_disable is named (or similar is named) 
in all device structs. 

Fix the mainboard dts to use the 8111 pci as the bridge. Add bridge keyword
to the amd8111 pci dts. 

This gets to this point:

Phase 6: Initializing devices...
Phase 6: Root Device init.
domain_0_pci0_18_0_pci_0_0_pci: Unknown device path type: 0
Phase 6:  init.
domain_0_pci0_18_0_pci_0_0_pci: Unknown device path type: 0
 missing resource: 10


and stop. Still working on that. BUT: the config space shows bus 1 now!

Signed-off-by: Ronald G. Minnich <rminnich at gmail.com>

It didn't build until I removed the Makefile change.  It complained about
multiple definitions.  I'm also wondering if all we need to do is disable
the 8111's nic and serial controller.  They showed up as extra compared to
v2.

With the Makefile change:
Acked-by: Myles Watson <mylesgw at gmail.com>

Thanks,
Myles