nb/intel/i945: Put names to northbridge PCI devices

Tested with BUILD_TIMELESS=1, Getac P470 does not change.

Change-Id: I0d51f48f0c1e37c41322a0eda49806925d9d194d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42285
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/northbridge/intel/i945/bootblock.c

@@ -18,5 +18,5 @@ void bootblock_early_northbridge_init(void)
 	 * The PCIEXBAR is assumed to live in the memory mapped IO space under 4GiB.
 	 */
 	reg = CONFIG_MMCONF_BASE_ADDRESS | 4 | 1; /* 64MiB - 0-63 buses. */
-	pci_io_write_config32(PCI_DEV(0, 0, 0), PCIEXBAR, reg);
+	pci_io_write_config32(HOST_BRIDGE, PCIEXBAR, reg);
 }