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/cmd/cros_ec.c b/cmd/cros_ec.c
index 9d42f87..af0b4ee 100644
--- a/cmd/cros_ec.c
+++ b/cmd/cros_ec.c
@@ -110,7 +110,7 @@
 		/* Remove any existing device */
 		ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
 		if (!ret)
-			device_remove(udev);
+			device_remove(udev, DM_REMOVE_NORMAL);
 		ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
 		if (ret) {
 			printf("Could not init cros_ec device (err %d)\n", ret);