[SCSI] add scsi_reprobe_device

Original from Christoph Hellwig and Eric Moore.  This version exports
the scsi_reprobe_device() function as an inline.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 1ec17ee..f2193cd 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -293,6 +293,11 @@
 			      void (*done)(void *, char *, int, int),
 			      gfp_t gfp);
 
+static inline void scsi_device_reprobe(struct scsi_device *sdev)
+{
+	device_reprobe(&sdev->sdev_gendev);
+}
+
 static inline unsigned int sdev_channel(struct scsi_device *sdev)
 {
 	return sdev->channel;