device/path: rename domain path struct element to 'domain_id'

Rename the 'domain' element of the 'domain_path' struct to 'domain_id'
to clarify that this element is the domain ID.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Suggested-by: Martin Roth <gaumless@gmail.com>
Change-Id: I3995deb83a669699434f0073aed0e12b688bf6e7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83677
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Shuo Liu <shuo.liu@intel.com>

src/include/device/path.h

@@ -53,7 +53,7 @@ enum device_path_type {
 }
 
 struct domain_path {
-	unsigned int domain;
+	unsigned int domain_id;
 };
 
 struct pci_path {