spl: Make SHOW_ERRORS depend on LIBCOMMON

The purpose of SHOW_ERRORS is to print extra information. Make it depend
on LIBCOMMON to avoid having to check for two configs.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2 files changed