Input: gpio_keys_polled - allow specifying name of input device

Instead of hardcoding the input name to the driver name
('gpio-keys-polled'), allow specifying the name of the device via
"label" property. If the property is not present (nor name is set in
board-supplied platform data), we'll default to the old name.

Signed-off-by: Enrico Weigelt, metux IT consult <[e-mail]>
Signed-off-by: Dmitry Torokhov <[e-mail]>

drivers/input/keyboard/gpio_keys_polled.c

···
 	pdata->rep = device_property_present(dev, "autorepeat");
 	device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);
 
+	device_property_read_string(dev, "label", &pdata->name);
+
 	device_for_each_child_node(dev, child) {
 		if (fwnode_property_read_u32(child, "linux,code",
 					     &button->code)) {
···
 
 	input = poll_dev->input;
 
-	input->name = pdev->name;
+	input->name = pdata->name ?: pdev->name;
 	input->phys = DRV_NAME"/input0";
 
 	input->id.bustype = BUS_HOST;