sconfig: rename pci_domain -> domain

The name pci_domain was a bit misleading, since the construct is only
PCI specific in a particular (northbridge/cpu) implementation, but not
by concept. As implementations and hardware change, be more generic
about our naming. This will allow us to support non-PCI systems without
adding new keywords.

Change-Id: Ide885a1d5e15d37560c79b936a39252150560e85
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2376
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/intel/d810e2cb/devicetree.cb b/src/mainboard/intel/d810e2cb/devicetree.cb
index 4129336..f5afa92 100644
--- a/src/mainboard/intel/d810e2cb/devicetree.cb
+++ b/src/mainboard/intel/d810e2cb/devicetree.cb
@@ -24,7 +24,7 @@
       device lapic 0 on end              # APIC
     end
   end
-  device pci_domain 0 on                # PCI domain
+  device domain 0 on                # PCI domain
     device pci 0.0 on end               # Graphics Memory Controller Hub (GMCH)
     device pci 1.0 on end		# Chipset Graphics Controller (CGC)
     chip southbridge/intel/i82801bx     # Southbridge