dt-bindings: add documentation for banks

Add documentation for at91 pin controller banks.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Claudiu Beznea 2019-02-07 09:24:57 +00:00 • committed by Linus Walleij
commit 1d741f2e97