drivers: input: add missing GPIO_KEYS GPIO dependency

Add a missing dependency between GPIO_KEYS and GPIO.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

drivers/input/Kconfig.gpio_keys

@@ -5,5 +5,6 @@ config INPUT_GPIO_KEYS
 	bool "Zephyr GPIO Keys"
 	default y
 	depends on DT_HAS_ZEPHYR_GPIO_KEYS_ENABLED
+	depends on GPIO
 	help
 	  Enable support for Zephyr GPIO Keys.