3.11: add resetctrl and cape files

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Added IIO to Kconfig

Took a headache to figure out why the ADC driver isn't loading.
These lines are from the previous 3.8 Kconfig..

This patches the 3.11 config beaglebone file to add IIO support..

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>