linux-phytec-fsl

ARM: at91: sam9rl: add at91_adc to support adc and touchscreen

The ADC clock needs to be defined to enable the at91_adc driver. It is defined
to the same speed that is used for atmel_tsadcc.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>