tools: add iucode-tool

Add tool to "compile" Intel microcode files. The tool will be
compiled for host (to split the microcode.dat) and for target
(to forcibly reload the microcode if required).

Instead of using the large microcode.bin/microcode-64.bin, the
splitted ucode files (separate for CPU families) will be
installed.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

package/system/iucode-tool/Makefile

@@ -0,0 +1,47 @@
+#
+# Copyright (C) 2018 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=iucode-tool
+PKG_VERSION:=2.3.1
+PKG_RELEASE:=1
+
+PKG_SOURCE:=iucode-tool_$(PKG_VERSION).tar.xz
+PKG_SOURCE_URL:=https://gitlab.com/iucode-tool/releases/raw/latest
+PKG_HASH:=12b88efa4d0d95af08db05a50b3dcb217c0eb2bfc67b483779e33d498ddb2f95
+
+PKG_BUILD_DEPENDS:=USE_UCLIBC:argp-standalone USE_MUSL:argp-standalone
+
+PKG_MAINTAINER:=Zoltan HERPAI <wigyori@uid0.hu>
+PKG_LICENSE:=GPL-2.0
+
+PKG_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/host-build.mk
+
+define Package/iucode-tool
+  SECTION:=utils
+  CATEGORY:=Base system
+  URL:=$(PKG_SOURCE_URL)
+  DEPENDS:=@TARGET_x86
+  TITLE:=Intel microcode loader
+endef
+
+define Package/iucode-tool/install
+	$(INSTALL_DIR) $(1)/lib/firmware
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/iucode_tool $(1)/usr/bin/
+endef
+
+define Host/Install
+	$(INSTALL_BIN) $(HOST_BUILD_DIR)/iucode_tool $(STAGING_DIR_HOST)/bin/iucode_tool
+endef
+
+$(eval $(call HostBuild))
+$(eval $(call BuildPackage,iucode-tool))