add missing toolchain description file

target/arm/sys-available/toolchain-armhf

@@ -0,0 +1,12 @@
+config ADK_TARGET_SYSTEM_TOOLCHAIN_ARMHF
+	bool "Toolchain only (hard float)"
+	select ADK_arm
+	select ADK_toolchain_armhf
+	select ADK_little
+	select ADK_hard_float
+	select ADK_TOOLCHAIN
+	select ADK_EABIHF
+	select ADK_TARGET_PACKAGE_TGZ
+	help
+	  ARM toolchain (hard float).
+