u-boot: fw-utils: reset on Poky 2.2 upstream

Grab a couple updates from the upstream poky recipe that were missed
when moving to morty.

Tested: Built image and verified fw-utils
Change-Id: I228249cb366decad7642033fb8c494514f982ccd
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-bsp/u-boot/u-boot-fw-utils_2016.07.bb b/common/recipes-bsp/u-boot/u-boot-fw-utils_2016.07.bb
index 6e2aeac..e5a9036 100644
--- a/common/recipes-bsp/u-boot/u-boot-fw-utils_2016.07.bb
+++ b/common/recipes-bsp/u-boot/u-boot-fw-utils_2016.07.bb
@@ -28,10 +28,7 @@
 	install -m 755 ${S}/tools/env/fw_printenv ${D}${bindir_cross}/fw_setenv
 }
 
-SYSROOT_PREPROCESS_FUNCS_class-cross = "uboot_fw_utils_cross"
-uboot_fw_utils_cross() {
-	sysroot_stage_dir ${D}${bindir_cross} ${SYSROOT_DESTDIR}${bindir_cross}
-}
+SYSROOT_DIRS_append_class-cross = " ${bindir_cross}"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 BBCLASSEXTEND = "cross"