arc: select GPIOLIB directly

Instead of indirectly selecting GPIOLIB via the
ARCH_REQUIRE_GPIOLIB symbol, just select GPIOLIB.

Cc: Michael Büsch <m@bues.ch>
Cc: linux-snps-arc@lists.infradead.org
Acked-by: Vineet Gupta <vgupt@synopsys.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arc/plat-tb10x/Kconfig b/arch/arc/plat-tb10x/Kconfig
index d14b3d3..149e091 100644
--- a/arch/arc/plat-tb10x/Kconfig
+++ b/arch/arc/plat-tb10x/Kconfig
@@ -21,7 +21,7 @@
 	select PINCTRL
 	select PINCTRL_TB10X
 	select PINMUX
-	select ARCH_REQUIRE_GPIOLIB
+	select GPIOLIB
 	select GPIO_TB10X
 	select TB10X_IRQC
 	help