ARM: OMAP: mmc-twl4030: add regulator sleep / wake function

Add the ability for the driver to put the card power regulators to sleep
and wake them up again.

Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Acked-by: Matt Fleming <matt@console-pimps.org>
Cc: Ian Molton <ian@mnementh.co.uk>
Cc: "Roberto A. Foglietta" <roberto.foglietta@gmail.com>
Cc: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Cc: Denis Karpov <ext-denis.2.karpov@nokia.com>
Cc: Pierre Ossman <pierre@ossman.eu>
Cc: Philip Langdale <philipl@overt.org>
Cc: "Madhusudhan" <madhu.cr@ti.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/plat-omap/include/mach/mmc.h b/arch/arm/plat-omap/include/mach/mmc.h
index 82f1e29..9390297 100644
--- a/arch/arm/plat-omap/include/mach/mmc.h
+++ b/arch/arm/plat-omap/include/mach/mmc.h
@@ -95,6 +95,8 @@
 		int (* set_bus_mode)(struct device *dev, int slot, int bus_mode);
 		int (* set_power)(struct device *dev, int slot, int power_on, int vdd);
 		int (* get_ro)(struct device *dev, int slot);
+		int (*set_sleep)(struct device *dev, int slot, int sleep,
+				 int vdd, int cardsleep);
 
 		/* return MMC cover switch state, can be NULL if not supported.
 		 *