dm: Rename DM_FLAG_REMOVE_WITH_PD_ON

This flag has the word 'REMOVE' in it which means it conflicts with
the DM_REMOVE flags. Rename it to DM_FLAG_LEAVE_PD_ON which seems to
indicate its purpose well enough.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/device-remove.c b/drivers/core/device-remove.c
index 7e8f3af..7874d53 100644
--- a/drivers/core/device-remove.c
+++ b/drivers/core/device-remove.c
@@ -200,7 +200,7 @@
 
 	if (!(flags & DM_REMOVE_NO_PD) &&
 	    !(drv->flags &
-	      (DM_FLAG_DEFAULT_PD_CTRL_OFF | DM_FLAG_REMOVE_WITH_PD_ON)) &&
+	      (DM_FLAG_DEFAULT_PD_CTRL_OFF | DM_FLAG_LEAVE_PD_ON)) &&
 	    dev != gd->cur_serial_dev)
 		dev_power_domain_off(dev);