ARM: at91: add TWI bindings to RM9200 DT

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91: add pinctrl nodes to i2c-gpio on RM92000 DT

GPIO pins used by i2c-gpio must be set to multi drive
(open drain) to work properly.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91: add MPA 1600 DT board

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
[nicolas.ferre@atmel.com: remove unneeded address-cells and size-cells to gpio-keys]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
ARM: at91/dt: gpio-keys: remove address-cells and size-cells properties

Gpio-keys nodes are not using the "reg" property in their sub nodes.
So, there is no need to define #address-cells and #size-cells properties
in gpio-keys nodes: we remove them.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>