configs: sandbox: Enable sub command 'env info'

Enable support for sub command 'env info' in sandbox
with CONFIG_CMD_NVEDIT_INFO. This is aimed primarily
at adding unit test.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index b3274a9..c2f8732 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -34,6 +34,7 @@
 CONFIG_CMD_GREPENV=y
 CONFIG_CMD_ENV_CALLBACK=y
 CONFIG_CMD_ENV_FLAGS=y
+CONFIG_CMD_NVEDIT_INFO=y
 CONFIG_LOOPW=y
 CONFIG_CMD_MD5SUM=y
 CONFIG_CMD_MEMINFO=y