cmd: env: use ENV_IS_IN_DEVICE in env info

cmd: env: use ENV_IS_IN_DEVICE in env info

Use the define ENV_IS_IN_DEVICE to test if one the
CONFIG_ENV_IS_IN_...  is defined and correct the detection of
persistent storage support in the command "env info"
if CONFIG_ENV_IS_NOWHERE is activated.

Since commit 60d5ed2593c9 ("env: allow ENV_IS_NOWHERE with
other storage target") test CONFIG_ENV_IS_NOWHERE is not
enough; see also commit 953db29a1e9c6 ("env: enable saveenv
command when one CONFIG_ENV_IS_IN is activated").

This patch avoids issue for this command in stm32mp1 platform.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>