Replace calls of old bdrv_open

What is known today as bdrv_open2 becomes the new bdrv_open. All remaining
callers of the old function are converted to the new one. In some places they
even know the right format, so they should have used bdrv_open2 from the
beginning.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>

qemu-io.c

@@ -1284,7 +1284,7 @@ static int openfile(char *name, int flags, int growable)
 		flags |= BDRV_O_FILE;
 	}
 
-	if (bdrv_open(bs, name, flags) < 0) {
+	if (bdrv_open(bs, name, flags, NULL) < 0) {
 		fprintf(stderr, "%s: can't open device %s\n", progname, name);
 		bs = NULL;
 		return 1;