Input: sx8654 - add sx8655 and sx8656 to compatibles

As the sx865[456] share the same datasheet and differ only in the
presence of a "capacitive proximity detection circuit" and a "haptics
motor driver for LRA/ERM" add them to the compatbiles. As the driver
doesn't implement these features it should be no problem.
Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/touchscreen/sx8654.txt

 * Semtech SX8654 I2C Touchscreen Controller
 
 Required properties:
-- compatible: must be "semtech,sx8654"
+- compatible: must be one of the following, depending on the model:
+	"semtech,sx8654"
+	"semtech,sx8655"
+	"semtech,sx8656"
 - reg: i2c slave address
 - interrupts: touch controller interrupt
 

drivers/input/touchscreen/sx8654.c

@@ -291,6 +291,8 @@ static int sx8654_probe(struct i2c_client *client,
 #ifdef CONFIG_OF
 static const struct of_device_id sx8654_of_match[] = {
 	{ .compatible = "semtech,sx8654", },
+	{ .compatible = "semtech,sx8655", },
+	{ .compatible = "semtech,sx8656", },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, sx8654_of_match);
@@ -298,6 +300,8 @@ MODULE_DEVICE_TABLE(of, sx8654_of_match);
 
 static const struct i2c_device_id sx8654_id_table[] = {
 	{ "semtech_sx8654", 0 },
+	{ "semtech_sx8655", 0 },
+	{ "semtech_sx8656", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(i2c, sx8654_id_table);