tegra: Fix build error in plutux, medcom

We need to define CONFIG_ENV_IS_NOWHERE to avoid this error:

cmd_nvedit.c:69:3: error: #error Define one of CONFIG_ENV_IS_IN_...

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
2 files changed