sh: sh7722: 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

@@ -527,6 +527,7 @@ config CPU_SUBTYPE_SH7722
 	select SYS_SUPPORTS_NUMA
 	select SYS_SUPPORTS_CMT
 	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select PINCTRL
 
 config CPU_SUBTYPE_SH7366
 	bool "Support SH7366 processor"

arch/sh/kernel/cpu/sh4a/pinmux-sh7722.c

 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/gpio.h>
+#include <cpu/pfc.h>
 #include <cpu/sh7722.h>
 
 enum {
@@ -1778,7 +1779,7 @@ static struct pinmux_info sh7722_pinmux_info = {
 
 static int __init plat_pinmux_setup(void)
 {
-	return register_pinmux(&sh7722_pinmux_info);
+	return sh_pfc_register_info(NULL, NULL, 0, &sh7722_pinmux_info);
 }
 
 arch_initcall(plat_pinmux_setup);