fix typo in Makefile
diff --git a/Makefile b/Makefile
index 1c1c4a4..1bd3b25 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@
 -include .singlemake
 
 $(KCONFIG_CONFIG): $(KCONFIG_TOP)
-	@if [ -e "$(KCONFG_CONFIG)" ]; then make silentoldconfig; \
+	@if [ -e "$(KCONFIG_CONFIG)" ]; then make silentoldconfig; \
 	else echo "Not configured (run 'make defconfig' or 'make menuconfig')";\
 	exit 1; fi