sunxi: Do not build i2c support when we've no i2c controllers

This fixes the following errors being printed during boot:

Error, wrong i2c adapter 0 max 0 possible
Error, wrong i2c adapter 0 max 0 possible

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
1 file changed