km/common: switch on CMD_GREPENV

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
diff --git a/include/configs/km/keymile-common.h b/include/configs/km/keymile-common.h
index a82987d..7330230 100644
--- a/include/configs/km/keymile-common.h
+++ b/include/configs/km/keymile-common.h
@@ -18,6 +18,7 @@
 #define CONFIG_CMD_ASKENV
 #define CONFIG_CMD_DHCP
 #define CONFIG_CMD_DEFAULTENV_VARS
+#define CONFIG_CMD_GREPENV
 #define CONFIG_CMD_ECHO
 #define CONFIG_CMD_IMMAP
 #define CONFIG_CMD_MII