nb/intel/i945: Move to C_ENVIRONMENT_BOOTBLOCK

Console init in bootblock will be done in a separate CL.

Change-Id: Ia2405013f262d904aa82be323e928223dbb4296c
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36795
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/northbridge/intel/i945/bootblock.c

@@ -11,12 +11,11 @@
  * GNU General Public License for more details.
  */
 
+#include <cpu/intel/car/bootblock.h>
 #include <device/pci_ops.h>
+#include "i945.h"
 
-/* Just re-define this instead of including i945.h. It blows up romcc. */
-#define PCIEXBAR	0x48
-
-static void bootblock_northbridge_init(void)
+void bootblock_early_northbridge_init(void)
 {
 	uint32_t reg;