util: Use common ARRAY_SIZE define

Remove duplicated definitions of ARRAY_SIZE macro across util/ dir.
Instead of duplicates, use the one from commonlib/bsd/helpers.h file.

BUG=b:231765496
TEST=make -C util/cbfstool; make -C util/cbmem;
     make -C util/intelmetool; make -C util/superiotool

Change-Id: I29b776586b4f0548d4026b2ac77095791fc9f3a3
Signed-off-by: Konrad Adamczyk <konrada@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74474
Reviewed-by: Jakub Czapiga <jacz@semihalf.com>
Reviewed-by: Grzegorz Bernacki
Reviewed-by: Robert Zieba <robertzieba@google.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/superiotool/Makefile

@@ -2,6 +2,7 @@
 
 PROGRAM = superiotool
 
+TOP     ?= $(abspath ../..)
 CC      ?= gcc
 INSTALL ?= /usr/bin/env install
 PREFIX  ?= /usr/local
@@ -11,7 +12,8 @@ PREFIX  ?= /usr/local
 VERSION := -D'SUPERIOTOOL_VERSION="$(shell git describe 2>/dev/null)"'
 
 CFLAGS += -O2 -Wall -Wstrict-prototypes -Wundef -Wstrict-aliasing \
-         -Werror-implicit-function-declaration -ansi -pedantic $(VERSION)
+         -Werror-implicit-function-declaration -ansi -pedantic $(VERSION) \
+         -Wno-variadic-macros -I $(TOP)/src/commonlib/bsd/include
 LDFLAGS += -lz
 
 OBJS = superiotool.o serverengines.o ali.o exar.o fintek.o ite.o nsc.o \