sh: use gpiolib

This patch updates the SuperH gpio code to make use of gpiolib. The
gpiolib callbacks get() and set() are lockless, but we use our own
spinlock for the other operations to make sure hardware register
bitfield accesses stay atomic.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/Kconfig

@@ -165,7 +165,7 @@ config SH_SH7785LCR_29BIT_PHYSMAPS
 config SH_MIGOR
 	bool "Migo-R"
 	depends on CPU_SUBTYPE_SH7722
-	select GENERIC_GPIO
+	select ARCH_REQUIRE_GPIOLIB
 	help
 	  Select Migo-R if configuring for the SH7722 Migo-R platform
           by Renesas System Solutions Asia Pte. Ltd.
@@ -173,7 +173,7 @@ config SH_MIGOR
 config SH_AP325RXA
 	bool "AP-325RXA"
 	depends on CPU_SUBTYPE_SH7723
-	select GENERIC_GPIO
+	select ARCH_REQUIRE_GPIOLIB
 	help
 	  Renesas "AP-325RXA" support.
 	  Compatible with ALGO SYSTEM CO.,LTD. "AP-320A"