sh: shx3: Register PFC platform device

Add arch code to register the PFC platform device instead of calling the
driver directly. Platform device registration in the sh-pfc driver will
be removed.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 27f0b73..c72b616 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -515,6 +515,7 @@
 	select CPU_SHX3
 	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 	select ARCH_REQUIRE_GPIOLIB
+	select PINCTRL
 
 # SH4AL-DSP Processor Support