Input: soc_button_array - select CONFIG_GPIOLIB_LEGACY

This driver converts information from ACPI in x86 based tablets and
laptops into platform_data for the gpio_keys driver, using the obsolete
gpio number based interfaces.

This should really be converted to some other method, but since the
conversion is nontrivial, have this one select GPIOLIB_LEGACY for the
time being.

This enables turning GPIOLIB_LEGACY off by default on most kernel
builds. Since the driver is only used on x86 portables, add a CONFIG_X86
dependency, which means non-x86 allmodconfig builds usuallly build
without the legacy gpio support.

Link: https://lore.kernel.org/all/ah-1z9LhVG0wtfBw@google.com/
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> # for input
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/input/misc/Kconfig

@@ -892,6 +892,9 @@ config INPUT_IDEAPAD_SLIDEBAR
 config INPUT_SOC_BUTTON_ARRAY
 	tristate "Windows-compatible SoC Button Array"
 	depends on KEYBOARD_GPIO && ACPI
+	depends on X86
+	depends on GPIOLIB
+	select GPIOLIB_LEGACY
 	help
 	  Say Y here if you have a SoC-based tablet that originally runs
 	  Windows 8 or a Microsoft Surface Book 2, Pro 5, Laptop 1 or later.

drivers/input/misc/soc_button_array.c

@@ -15,7 +15,6 @@
 #include <linux/dmi.h>
 #include <linux/gpio/consumer.h>
 #include <linux/gpio_keys.h>
-#include <linux/gpio.h>
 #include <linux/platform_device.h>
 
 static bool use_low_level_irq;