Consolidate driver_probe_done() loops into one place

there's a few places that currently loop over driver_probe_done(), and
I'm about to add another one. This patch abstracts it into a helper
to reduce duplication.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <lenb@kernel.org>
Acked-by: Greg KH <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/device.h b/include/linux/device.h
index 45e5b19..47f343c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -147,6 +147,8 @@
 extern struct device_driver *driver_find(const char *name,
 					 struct bus_type *bus);
 extern int driver_probe_done(void);
+extern int wait_for_device_probe(void);
+
 
 /* sysfs interface for exporting driver attributes */