intel/common/firmware: Add common GBE rom support

Add support to the Intel common firmware Kconfig and Makefile.inc to
allow the Gigabit Ethernet (GBE) blob to be added to the final
binary.

Change-Id: Id5fab3061874dad759750b67d3339eb8c99a62d6
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/10875
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>

src/southbridge/intel/common/firmware/Kconfig

@@ -56,6 +56,19 @@ config ME_BIN_PATH
 	default "3rdparty/blobs/mainboard/$(MAINBOARDDIR)/me.bin"
 	depends on HAVE_ME_BIN
 
+config HAVE_GBE_BIN
+	bool "Add gigabit ethernet firmware"
+	depends on HAVE_IFD_BIN
+	help
+	  The integrated gigabit ethernet controller needs a firmware file.
+	  Select this if you are going to use the PCH integrated controller
+	  and have the firmware.
+
+config GBE_BIN_PATH
+	string "Path to gigabit ethernet firmware"
+	depends on HAVE_GBE_BIN
+	default "3rdparty/blobs/mainboard/$(MAINBOARDDIR)/gbe.bin"
+
 ##### Fake IFD #####
 
 config BUILD_WITH_FAKE_IFD

src/southbridge/intel/common/firmware/Makefile.inc

@@ -58,6 +58,13 @@ ifeq ($(CONFIG_HAVE_ME_BIN),y)
 		$(obj)/coreboot.pre
 	mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre
 endif
+ifeq ($(CONFIG_HAVE_GBE_BIN),y)
+	printf "    IFDTOOL    gbe.bin -> coreboot.pre\n"
+	$(objutil)/ifdtool/ifdtool \
+		-i GbE:$(CONFIG_GBE_BIN_PATH) \
+		$(obj)/coreboot.pre
+	mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre
+endif
 ifeq ($(CONFIG_LOCK_MANAGEMENT_ENGINE),y)
 	printf "    IFDTOOL    Locking Management Engine\n"
 	$(objutil)/ifdtool/ifdtool -l $(obj)/coreboot.pre