armv8: ls2085a: Add support of CONFIG_CMD_GREPENV

Enable CONFIG_CMD_GREPENV to allow search in env variables

Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/include/configs/ls2085a_common.h b/include/configs/ls2085a_common.h
index cd01904..2dbb5f7 100644
--- a/include/configs/ls2085a_common.h
+++ b/include/configs/ls2085a_common.h
@@ -218,6 +218,7 @@
 #define CONFIG_CMD_CACHE
 #define CONFIG_CMD_DHCP
 #define CONFIG_CMD_ENV
+#define CONFIG_CMD_GREPENV
 #define CONFIG_CMD_MII
 #define CONFIG_CMD_PING