ARM: at91/defconfig: change the MCI driver to use in defconfigs

Since atmel-mci driver supports all atmel mci versions,
use it instead of the deprecated at91_mci driver.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/arch/arm/configs/at91rm9200_defconfig b/arch/arm/configs/at91rm9200_defconfig
index d54e2ac..4ae57a3 100644
--- a/arch/arm/configs/at91rm9200_defconfig
+++ b/arch/arm/configs/at91rm9200_defconfig
@@ -232,7 +232,7 @@
 CONFIG_USB_ETH=m
 CONFIG_USB_MASS_STORAGE=m
 CONFIG_MMC=y
-CONFIG_MMC_AT91=y
+CONFIG_MMC_ATMELMCI=y
 CONFIG_NEW_LEDS=y
 CONFIG_LEDS_CLASS=y
 CONFIG_LEDS_GPIO=y