gpiolib: enable CONFIG_GPIOLIB_LEGACY even for !GPIOLIB

A few drivers that use the legacy GPIOLIB interfaces can be enabled
even when GPIOLIB is disabled entirely. With my previous patch this
now causes build failures like:

   drivers/nfc/s3fwrn5/uart.c: In function 's3fwrn82_uart_parse_dt':
        drivers/nfc/s3fwrn5/uart.c:100:14: error: implicit declaration of function 'gpio_is_valid'; did you mean 'uuid_is_valid'? [-Werror=implicit-function-declaration]

These did not show up in my randconfig tests because randconfig almost
always has GPIOLIB selected by some other driver, and I did most
of the testing with follow-up patches that address the failures
properly.

Move the symbol outside of the 'if CONFIG_GPIOLIB' block for the moment
to avoid the build failures. It can be moved back and turned off by
default once all the driver specific changes are merged.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202507261934.yIHeUuEQ-lkp@intel.com/
Fixes: 678bae2 ("gpiolib: make legacy interfaces optional")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250726211053.2226857-1-arnd@kernel.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: arndb

drivers/gpio/Kconfig

@@ -12,11 +12,11 @@ menuconfig GPIOLIB
 
 	  If unsure, say N.
 
-if GPIOLIB
-
 config GPIOLIB_LEGACY
 	def_bool y
 
+if GPIOLIB
+
 config GPIOLIB_FASTPATH_LIMIT
 	int "Maximum number of GPIOs for fast path"
 	range 32 512