device/device.h: Rename pci_domain_scan_bus

On all targets the domain works as a host bridge. Xeon-sp code intends
to feature multiple host bridges below a domain, hence rename the
function to pci_host_bridge_scan_bus.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Change-Id: I4e65fdbaf0b42c5f4f62297a60d818d299d76f73
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78326
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>

src/device/pci_device.c

@@ -1662,7 +1662,7 @@ void pci_scan_bridge(struct device *dev)
  *
  * @param dev Pointer to the domain.
  */
-void pci_domain_scan_bus(struct device *dev)
+void pci_host_bridge_scan_bus(struct device *dev)
 {
 	struct bus *link = dev->link_list;
 	pci_scan_bus(link, PCI_DEVFN(0, 0), 0xff);