intel/i945: Fix udelay() prototypes

Change-Id: Ia157c6417bdd9c4ffbdf07683c51d0680e9356c9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34228
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>

src/northbridge/intel/i945/raminit.c

@@ -16,6 +16,7 @@
 
 #include <console/console.h>
 #include <cpu/x86/cache.h>
+#include <delay.h>
 #include <device/pci_def.h>
 #include <device/pci_ops.h>
 #include <cf9_reset.h>