ARM: davinci_all_defconfig: Enable TI ADS7950

This enables the TI ADS7950 IIO driver. This is used on LEGO MINDSTORMS
EV3. The other IIO configs removed in this patch are selected by
CONFIG_TI_ADS7950, so they are not actually being desabled.
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/configs/davinci_all_defconfig

@@ -207,12 +207,10 @@ 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_TI_ADS7950=m
 CONFIG_IIO_HRTIMER_TRIGGER=m
 CONFIG_IIO_SYSFS_TRIGGER=m
 CONFIG_PWM=y