driver core: move to_platform_driver to platform_device.h

In converting the last remaining of_platform_driver (ibmebus) to a regular
platform driver, to_platform_driver is needed to replace
to_of_platform_driver.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@linaro.org>

drivers/base/platform.c

@@ -29,9 +29,6 @@
 /* For automatically allocated device IDs */
 static DEFINE_IDA(platform_devid_ida);
 
-#define to_platform_driver(drv)	(container_of((drv), struct platform_driver, \
-				 driver))
-
 struct device platform_bus = {
 	.init_name	= "platform",
 };

include/linux/platform_device.h

@@ -180,6 +180,9 @@ struct platform_driver {
 	const struct platform_device_id *id_table;
 };
 
+#define to_platform_driver(drv)	(container_of((drv), struct platform_driver, \
+				 driver))
+
 extern int platform_driver_register(struct platform_driver *);
 extern void platform_driver_unregister(struct platform_driver *);