busybox: Include hdparm by default on nas type device

NAS devices certainly need to have hdparm to configure
things like spin-down time or their disks will be
constantly spinning. Just catenate CONFIG_HDPARM=y
on these configs.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

package/utils/busybox/Makefile

@@ -92,6 +92,9 @@ ifneq ($(findstring c,$(OPENWRT_VERBOSE)),)
 endif
 
 define Build/Configure
+ifeq ($(DEVICE_TYPE),nas)
+	echo "CONFIG_HDPARM=y" >> $(PKG_BUILD_DIR)/.config
+endif
 	grep 'CONFIG_BUSYBOX_$(BUSYBOX_SYM)' $(TOPDIR)/.config | sed -e "s,\\(# \)\\?CONFIG_BUSYBOX_$(BUSYBOX_SYM)_\\(.*\\),\\1CONFIG_\\2,g" > $(PKG_BUILD_DIR)/.config
 	yes 'n' | $(MAKE) -C $(PKG_BUILD_DIR) $(MAKE_FLAGS) oldconfig
 endef