arm64: vulcan: enable GPIOLIB in Kconfig

Add select GPIOLIB in Kconfig for Broadcom Vulcan ARM64 GPIO driver.
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm64/Kconfig.platforms

@@ -168,6 +168,7 @@ config ARCH_VEXPRESS
 
 config ARCH_VULCAN
 	bool "Broadcom Vulcan SOC Family"
+	select GPIOLIB
 	help
 	  This enables support for Broadcom Vulcan SoC Family