gpio: pca953x: Add support for the TI TCA9539

The TI TCA9539 is a variant of the PCA953x GPIO expander,
with 16 GPIOs and interrupt functionality.
Signed-off-by: NPeter Robinson <pbrobinson@gmail.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-pca953x.c

@@ -1180,6 +1180,7 @@ static const struct of_device_id pca953x_dt_ids[] = {
 	{ .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), },
 	{ .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
 	{ .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
+	{ .compatible = "ti,tca9539", .data = OF_953X(16, PCA_INT), },
 
 	{ .compatible = "onnn,cat9554", .data = OF_953X( 8, PCA_INT), },
 	{ .compatible = "onnn,pca9654", .data = OF_953X( 8, PCA_INT), },