mips: remove redundant GENERIC_GPIO select

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

arch/mips/Kconfig

@@ -1201,7 +1201,6 @@ config CPU_LOONGSON2F
 	bool "Loongson 2F"
 	depends on SYS_HAS_CPU_LOONGSON2F
 	select CPU_LOONGSON2
-	select GENERIC_GPIO
 	select ARCH_REQUIRE_GPIOLIB
 	help
 	  The Loongson 2F processor implements the MIPS III instruction set