dm: core: Add flags parameter to device_remove()

This patch adds the flags parameter to device_remove() and changes all
calls to this function to provide the default value of DM_REMOVE_NORMAL
for "normal" device removal.

This is in preparation for the driver specific pre-OS (e.g. DMA
cancelling) remove support.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/block/sandbox.c b/drivers/block/sandbox.c
index 36c2ff3..34d1c63 100644
--- a/drivers/block/sandbox.c
+++ b/drivers/block/sandbox.c
@@ -98,7 +98,7 @@
 	/* Remove and unbind the old device, if any */
 	ret = blk_get_device(IF_TYPE_HOST, devnum, &dev);
 	if (ret == 0) {
-		ret = device_remove(dev);
+		ret = device_remove(dev, DM_REMOVE_NORMAL);
 		if (ret)
 			return ret;
 		ret = device_unbind(dev);