dm: core: Drop unused parameter from dm_scan_fdt()

This doesn't need to be passed the devicetree anymore. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/dm/root.h

@@ -47,12 +47,11 @@ int dm_scan_platdata(bool pre_reloc_only);
  * This scans the device tree and creates a driver for each node. Only
  * the top-level subnodes are examined.
  *
- * @blob: Pointer to device tree blob
  * @pre_reloc_only: If true, bind only nodes with special devicetree properties,
  * or drivers with the DM_FLAG_PRE_RELOC flag. If false bind all drivers.
  * @return 0 if OK, -ve on error
  */
-int dm_scan_fdt(const void *blob, bool pre_reloc_only);
+int dm_scan_fdt(bool pre_reloc_only);
 
 /**
  * dm_extended_scan_fdt() - Scan the device tree and bind drivers