[SCSI] sd, sr: do not emit change event at device add

Initialize the "state changed" flag, so we do not send a change event
immediately after registering a new device.

Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 7aee64d..5fe7aae 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1654,6 +1654,7 @@
 	sdkp->disk = gd;
 	sdkp->index = index;
 	sdkp->openers = 0;
+	sdkp->previous_state = 1;
 
 	if (!sdp->timeout) {
 		if (sdp->type != TYPE_MOD)