nb/intel/i945/bootblock.c: include <arch/pci_io_cfg.h>

Also replace 'reg' with 'reg32'.

Change-Id: I2aa8862de0f7629386ef09acbb0606056cc3697c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49537
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/northbridge/intel/i945/bootblock.c b/src/northbridge/intel/i945/bootblock.c
index f4b4628..edb9a8d 100644
--- a/src/northbridge/intel/i945/bootblock.c
+++ b/src/northbridge/intel/i945/bootblock.c
@@ -1,9 +1,10 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <arch/bootblock.h>
+#include <arch/pci_io_cfg.h>
 #include <assert.h>
-#include <device/pci_ops.h>
 #include <types.h>
+
 #include "i945.h"
 
 static uint32_t encode_pciexbar_length(void)
@@ -27,6 +28,6 @@
 	 *
 	 * The PCIEXBAR is assumed to live in the memory mapped IO space under 4GiB.
 	 */
-	const uint32_t reg = CONFIG_MMCONF_BASE_ADDRESS | encode_pciexbar_length() | 1;
-	pci_io_write_config32(HOST_BRIDGE, PCIEXBAR, reg);
+	const uint32_t reg32 = CONFIG_MMCONF_BASE_ADDRESS | encode_pciexbar_length() | 1;
+	pci_io_write_config32(HOST_BRIDGE, PCIEXBAR, reg32);
 }