env exists allows scripts to query whether an environment variable
exists. Enable by default as it adds only a trivial amount of code and
can be useful in scripts.
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
#define CONFIG_CMD_CONSOLE /* coninfo */
#define CONFIG_CMD_ECHO /* echo arguments */
#define CONFIG_CMD_EDITENV /* editenv */
+#define CONFIG_CMD_ENV_EXISTS /* query whether env variables exists */
#define CONFIG_CMD_FPGA /* FPGA configuration Support */
#define CONFIG_CMD_IMI /* iminfo */
#define CONFIG_CMD_ITEST /* Integer (and string) test */