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/at91sam9rl_defconfig b/arch/arm/configs/at91sam9rl_defconfig
index ad562ee..7cf8785 100644
--- a/arch/arm/configs/at91sam9rl_defconfig
+++ b/arch/arm/configs/at91sam9rl_defconfig
@@ -60,7 +60,7 @@
 CONFIG_FB=y
 CONFIG_FB_ATMEL=y
 CONFIG_MMC=y
-CONFIG_MMC_AT91=m
+CONFIG_MMC_ATMELMCI=m
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_AT91SAM9=y
 CONFIG_EXT2_FS=y