rapidio: move rio_pw_enable into core code

Make rio_pw_enable() routine available to other RapidIO drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/rio_drv.h b/include/linux/rio_drv.h
index 341b3bf..9fb2bcd 100644
--- a/include/linux/rio_drv.h
+++ b/include/linux/rio_drv.h
@@ -375,6 +375,7 @@
 			int (*)(struct rio_dev *, union rio_pw_msg*, int));
 extern int rio_release_inb_pwrite(struct rio_dev *);
 extern int rio_inb_pwrite_handler(union rio_pw_msg *pw_msg);
+extern void rio_pw_enable(struct rio_mport *mport, int enable);
 
 /* LDM support */
 int rio_register_driver(struct rio_driver *);