ARM: u8500_defconfig: update sensor config

The Ux500 is using buffered IIO as the sensors support
IRQs. The BH1780 ambient light sensor was added to IIO,
so disable the old misc driver and activate the driver
in IIO.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/configs/u8500_defconfig b/arch/arm/configs/u8500_defconfig
index f70f4649..6306e45 100644
--- a/arch/arm/configs/u8500_defconfig
+++ b/arch/arm/configs/u8500_defconfig
@@ -45,7 +45,6 @@
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=65536
-CONFIG_SENSORS_BH1780=y
 CONFIG_NETDEVICES=y
 CONFIG_SMSC911X=y
 CONFIG_SMSC_PHY=y
@@ -106,8 +105,10 @@
 CONFIG_STE_DMA40=y
 CONFIG_HSEM_U8500=y
 CONFIG_IIO=y
+CONFIG_IIO_BUFFER=y
 CONFIG_IIO_ST_ACCEL_3AXIS=y
 CONFIG_IIO_ST_GYRO_3AXIS=y
+CONFIG_BH1780=y
 CONFIG_IIO_ST_MAGN_3AXIS=y
 CONFIG_IIO_ST_PRESS=y
 CONFIG_EXT2_FS=y