ARM: davinci_all_defconfig: enable iio

This enables the iio subsystem. This will be used by LEGO MINDSTORMS EV3,
which has an ADS7957 chip.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/configs/davinci_all_defconfig

@@ -201,6 +201,15 @@ CONFIG_TI_EDMA=y
 CONFIG_MEMORY=y
 CONFIG_TI_AEMIF=m
 CONFIG_DA8XX_DDRCTL=y
+CONFIG_IIO=m
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_BUFFER_CB=m
+CONFIG_IIO_KFIFO_BUF=m
+CONFIG_IIO_TRIGGER=y
+CONFIG_IIO_SW_DEVICE=m
+CONFIG_IIO_SW_TRIGGER=m
+CONFIG_IIO_HRTIMER_TRIGGER=m
+CONFIG_IIO_SYSFS_TRIGGER=m
 CONFIG_PWM=y
 CONFIG_PWM_TIECAP=m
 CONFIG_PWM_TIEHRPWM=m