src: use ARRAY_SIZE where possible

Generated with a variant of
https://coccinelle.gitlabpages.inria.fr/website/rules/array.cocci

Change-Id: I083704fd48faeb6c67bba3367fbcfe554a9f7c66
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50594
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/northbridge/intel/ironlake/raminit.c

@@ -3770,8 +3770,7 @@ void raminit(const int s3resume, const u8 *spd_addrmap)
 					continue;
 				for (addr = 0;
 				     addr <
-				     sizeof(useful_addresses) /
-				     sizeof(useful_addresses[0]); addr++)
+				     ARRAY_SIZE(useful_addresses); addr++)
 					gav(info.
 					    spd[channel][0][useful_addresses
 							    [addr]] =