sh: sh7720: 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>

arch/sh/Kconfig

@@ -367,6 +367,7 @@ config CPU_SUBTYPE_SH7720
 	select ARCH_WANT_OPTIONAL_GPIOLIB
 	select USB_ARCH_HAS_OHCI
 	select USB_OHCI_SH if USB_OHCI_HCD
+	select PINCTRL
 	help
 	  Select SH7720 if you have a SH3-DSP SH7720 CPU.
 

arch/sh/kernel/cpu/sh3/pinmux-sh7720.c

@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/gpio.h>
+#include <cpu/pfc.h>
 #include <cpu/sh7720.h>
 
 enum {
@@ -1236,7 +1237,7 @@ static struct pinmux_info sh7720_pinmux_info = {
 
 static int __init plat_pinmux_setup(void)
 {
-	return register_pinmux(&sh7720_pinmux_info);
+	return sh_pfc_register_info(NULL, NULL, 0, &sh7720_pinmux_info);
 }
 
 arch_initcall(plat_pinmux_setup);