sh: Add pinmux for sh7264

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/boards/mach-rsk/Kconfig b/arch/sh/boards/mach-rsk/Kconfig
index 4abbdee..4315af5 100644
--- a/arch/sh/boards/mach-rsk/Kconfig
+++ b/arch/sh/boards/mach-rsk/Kconfig
@@ -15,6 +15,7 @@
 
 config SH_RSK7264
 	bool "RSK2+SH7264"
+	select ARCH_REQUIRE_GPIOLIB
 	depends on CPU_SUBTYPE_SH7264
 
 endchoice