add powerpc-utils (nvram, ppc64_cpu) to initramfs

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/configs/firestone_defconfig b/openpower/configs/firestone_defconfig
index 8e5ca47..4ac110a 100644
--- a/openpower/configs/firestone_defconfig
+++ b/openpower/configs/firestone_defconfig
@@ -60,5 +60,6 @@
 BR2_PACKAGE_RSYNC=y
 BR2_PACKAGE_PETITBOOT=y
 BR2_PACKAGE_IPMITOOL=y
+BR2_PACKAGE_POWERPC_UTILS=y
 BR2_TARGET_ROOTFS_CPIO_XZ=y
 BR2_TARGET_ROOTFS_INITRAMFS=y