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: NJohn Stultz <john.stultz@linaro.org>
Signed-off-by: NWei Xu <xuwei5@hisilicon.com>