WiP change mac from Heads

    Addition of nvmutil (nvm) from osboot project to play with gbe (Thanks @githubisnonfree!)
    Addition of ifdtool from coreboot project to extract gbe

Manually tested (working!)
    backup rom from: flashrom -p internal -r /tmp/backup.rom
    go to that dir: cd /tmp
    extract gbe from ifdtool on backup.rom: ifdtool -x backup.rom
    source shell functions: . /etc/functions
    show current PHY mac address: nvm showmac flashregion_3_gbe.bin
    generate mac address from sourced shell functions: newmac=$(generate_random_mac_address)
    show new mac: echo $newmac
    change mac from nvmtool on extracted gbe: nvm flashregion_3_gbe.bin setmac $newmac
    insert modified gbe into backup.rom.new with ifdtool: ifdtool -i gbe:flashregion_3_gbe.bin backup.rom
    flash back modified gbe only through flashrom: flashrom -p internal --ifd -i gbe -w backup.rom.new

Makefile

@@ -440,6 +440,7 @@ bin_modules-$(CONFIG_FBWHIPTAIL) += fbwhiptail
 bin_modules-$(CONFIG_HOTPKEY) += hotp-verification
 bin_modules-$(CONFIG_MSRTOOLS) += msrtools
 bin_modules-$(CONFIG_NKSTORECLI) += nkstorecli
+bin_modules-$(CONFIG_NVMUTIL) += nvmutil
 
 $(foreach m, $(bin_modules-y), \
 	$(call map,initrd_bin_add,$(call bins,$m)) \
@@ -451,7 +452,7 @@ $(foreach m, $(modules-y), \
 )
 
 #
-# hack to build cbmem from coreboot
+# hack to build cbmem and ifdtool from coreboot
 # this must be built *AFTER* musl, but since coreboot depends on other things
 # that depend on musl it should be ok.
 #
@@ -460,11 +461,13 @@ ifeq ($(CONFIG_COREBOOT),y)
 $(eval $(call initrd_bin_add,$(COREBOOT_UTIL_DIR)/cbmem/cbmem))
 #$(eval $(call initrd_bin_add,$(COREBOOT_UTIL_DIR)/superiotool/superiotool))
 #$(eval $(call initrd_bin_add,$(COREBOOT_UTIL_DIR)/inteltool/inteltool))
+$(eval $(call initrd_bin_add,$(COREBOOT_UTIL_DIR)/ifdtool/ifdtool))
 endif
 
 $(COREBOOT_UTIL_DIR)/cbmem/cbmem \
 $(COREBOOT_UTIL_DIR)/superiotool/superiotool \
 $(COREBOOT_UTIL_DIR)/inteltool/inteltool \
+$(COREBOOT_UTIL_DIR)/ifdtool/ifdtool \
 : $(build)/$(coreboot_base_dir)/.canary musl-cross
 	+$(call do,MAKE,$(notdir $@),\
 		$(MAKE) -C "$(dir $@)" $(CROSS_TOOLS) \

boards/x230-hotp-maximized/x230-hotp-maximized.config

@@ -20,6 +20,7 @@ CONFIG_LINUX_E1000E=y
 CONFIG_CRYPTSETUP2=y
 CONFIG_FLASHROM=y
 CONFIG_FLASHTOOLS=y
+CONFIG_NVMUTIL=y
 CONFIG_GPG2=y
 CONFIG_KEXEC=y
 CONFIG_UTIL_LINUX=y

modules/nvmutil

@@ -0,0 +1,21 @@
+modules-$(CONFIG_NVMUTIL) += nvmutil
+
+nvmutil_depends := $(musl_dep)
+
+nvmutil_version := 20220802
+nvmutil_dir := nvmutil-tools-$(nvmutil_version)
+nvmutil_tar := $(nvmutil_version).tar.gz
+nvmutil_url := https://notabug.org/osboot/nvmutil/archive/$(nvmutil_tar)
+nvmutil_hash := 9c82964c073bf38abcd64e9d394308fe88c92f1f828f4a1933284c972818493b
+
+nvmutil_target := \
+	$(CROSS_TOOLS) \
+	CFLAGS="-I$(INSTALL)/include" \
+	LDFLAGS="-L$(INSTALL)/lib" \
+
+nvmutil_output := \
+	nvm \
+
+nvmutil_libraries := \
+
+nvmutil_configure :=