gpio: Kconfig: make GPIO_SYSFS config always visible

To reduce boot time, we have disabled CONFIG_EXPERT and CONFIG_DEBUG_KERNEL
in seco-mx6 defconfig.

However, for backward compatibility, we need to leave CONFIG_GPIO_SYSFS
enabled. For this, the config should be visible even when expert mode is
disabled.

drivers/gpio/Kconfig

@@ -59,7 +59,7 @@ config DEBUG_GPIO
 	  that are most common when setting up new platforms or boards.
 
 config GPIO_SYSFS
-	bool "/sys/class/gpio/... (sysfs interface)" if EXPERT
+	bool "/sys/class/gpio/... (sysfs interface)"
 	depends on SYSFS
 	select GPIO_CDEV # We need to encourage the new ABI
 	help