gpio: Add Netlogic XLP GPIO devicetree bindings documentation

Provide documentation for Netlogic XLP SoCs GPIO controller DTS bindings.

Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1 file changed