Kconfig: ARCH_HISI: Add PINCTRL to HISI platform

Things won't work if PINCTRL isn't enabled,
so make sure to explicitly set it rather
then betting that we have some other platform
configed in which selects it.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Wei Xu <xuwei5@hisilicon.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/Kconfig.platforms

@@ -67,6 +67,7 @@ config ARCH_HISI
 	bool "Hisilicon SoC Family"
 	select ARM_TIMER_SP804
 	select HISILICON_IRQ_MBIGEN
+	select PINCTRL
 	help
 	  This enables support for Hisilicon ARMv8 SoC family