avr32: Use CONFIG_ATMEL_MCI to select the atmel_mci driver After we move the atmel_mci driver into drivers/mmc, we can't select it with CONFIG_MMC anymore. Introduce a new symbol specifically for this driver so that there's no ambiguity. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Jean-Chritophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>