ARM: omap2plus_defconfig: enable support for TI ADC

Enable support for on-chip ADC found on AM335x and
AM437x devices.
Signed-off-by: NSekhar Nori <nsekhar@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -269,6 +269,7 @@ CONFIG_MFD_PALMAS=y
 CONFIG_MFD_TPS65217=y
 CONFIG_MFD_TPS65218=y
 CONFIG_MFD_TPS65910=y
+CONFIG_MFD_TI_AM335X_TSCADC=m
 CONFIG_TWL6040_CORE=y
 CONFIG_REGULATOR_PALMAS=y
 CONFIG_REGULATOR_PBIAS=y
@@ -398,6 +399,8 @@ CONFIG_EXTCON=m
 CONFIG_EXTCON_USB_GPIO=m
 CONFIG_EXTCON_PALMAS=m
 CONFIG_TI_EMIF=m
+CONFIG_IIO=m
+CONFIG_TI_AM335X_ADC=m
 CONFIG_PWM=y
 CONFIG_PWM_TIECAP=m
 CONFIG_PWM_TIEHRPWM=m