ARM: select legacy gpiolib interfaces where used

ARM: select legacy gpiolib interfaces where used

A few old machines have not been converted away from the old-style
gpiolib interfaces. Make these select the new CONFIG_GPIOLIB_LEGACY
symbol so the code still works where it is needed but can be left
out otherwise.

Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20260428162757.540823-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>