kbuild: beautify the log of config whitelist check

Use the kbuild style log.

Prior to this commit:

./scripts/check-config.sh u-boot.cfg \
	./scripts/config_whitelist.txt . 1>&2

With this commit:

  CFGCHK  u-boot.cfg

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

Makefile

@@ -836,6 +836,10 @@ cmd_pad_cat = $(cmd_objcopy) && $(append) || rm -f $@
 
 cfg: u-boot.cfg
 
+quiet_cmd_cfgcheck = CFGCHK  $2
+cmd_cfgcheck = $(srctree)/scripts/check-config.sh $2 \
+		$(srctree)/scripts/config_whitelist.txt $(srctree)
+
 all:		$(ALL-y)
 ifeq ($(CONFIG_DM_I2C_COMPAT)$(CONFIG_SANDBOX),y)
 	@echo "===================== WARNING ======================"
@@ -847,8 +851,7 @@ endif
 	@# Check that this build does not use CONFIG options that we do not
 	@# know about unless they are in Kconfig. All the existing CONFIG
 	@# options are whitelisted, so new ones should not be added.
-	$(srctree)/scripts/check-config.sh u-boot.cfg \
-		$(srctree)/scripts/config_whitelist.txt ${srctree} 1>&2
+	$(call cmd,cfgcheck,u-boot.cfg)
 
 PHONY += dtbs
 dtbs: dts/dt.dtb

scripts/check-config.sh

@@ -37,12 +37,12 @@ cat `find ${srctree} -name "Kconfig*"` |sed -n \
 	-e 's/^menuconfig \([A-Za-z0-9_]*\).*$/CONFIG_\1/p' |sort |uniq > ${ok}
 comm -23 ${suspects} ${ok} >${new_adhoc}
 if [ -s ${new_adhoc} ]; then
-	echo "Error: You must add new CONFIG options using Kconfig"
-	echo "The following new ad-hoc CONFIG options were detected:"
-	cat ${new_adhoc}
-	echo
-	echo "Please add these via Kconfig instead. Find a suitable Kconfig"
-	echo "file and add a 'config' or 'menuconfig' option."
+	echo >&2 "Error: You must add new CONFIG options using Kconfig"
+	echo >&2 "The following new ad-hoc CONFIG options were detected:"
+	cat >&2 ${new_adhoc}
+	echo >&2
+	echo >&2 "Please add these via Kconfig instead. Find a suitable Kconfig"
+	echo >&2 "file and add a 'config' or 'menuconfig' option."
 	# Don't delete the temporary files in case they are useful
 	exit 1
 else