platform: add new device registration helper

Add a helper that registers simple platform_device w/o resources but with
parent and device data.

This is usefull to cleanup platform code from code that registers such
simple devices as leds-gpio, generic-bl, etc.

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 95ac21a..4b8cc6a 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -37,6 +37,8 @@
 
 extern struct platform_device *platform_device_register_simple(const char *, int id,
 					struct resource *, unsigned int);
+extern struct platform_device *platform_device_register_data(struct device *,
+		const char *, int, const void *, size_t);
 
 extern struct platform_device *platform_device_alloc(const char *name, int id);
 extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);