libpayload: Switch to commonlib ipchksum() algorithm

This patch moves libpayload over to the commonlib implementation for
calculating the IP checksum.

Change-Id: Ie8d323ce9f8d946758619761b4b22d54bce222b6
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80253
Reviewed-by: Jakub Czapiga <czapiga@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Yidi Lin <yidilin@google.com>

payloads/libpayload/include/libpayload.h

@@ -48,12 +48,12 @@
 #include <commonlib/bsd/elog.h>
 #include <commonlib/bsd/fmap_serialized.h>
 #include <commonlib/bsd/helpers.h>
+#include <commonlib/bsd/ipchksum.h>
 #include <commonlib/bsd/mem_chip_info.h>
 #include <ctype.h>
 #include <die.h>
 #include <endian.h>
 #include <fmap.h>
-#include <ipchksum.h>
 #include <kconfig.h>
 #include <stddef.h>
 #include <stdio.h>