config: Remove usage of CONFIG_STORAGE_EMMC

This config option seems to be unused and is probably vestigial.
Remove it.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Lokesh Vutla <lokeshvutla@ti.com>
4 files changed