dm: core: remove the duplicated function dm_ofnode_pre_reloc

The content dm_ofnode_pre_reloc() is identical with ofnode_pre_reloc()
defined in drivers/core/ofnode.c and used only three times:
- drivers/core/lists.c:lists_bind_fdt()
- drivers/clk/at91/pmc.c::at91_clk_sub_device_bind
- drivers/clk/altera/clk-arria10.c::socfpga_a10_clk_bind

So this function dm_ofnode_pre_reloc can be removed and replaced
by these function calls by ofnode_pre_reloc().

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 6b55ec5..f580844 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -61,7 +61,7 @@
 	     offset > 0;
 	     offset = fdt_next_subnode(fdt, offset)) {
 		if (pre_reloc_only &&
-		    !dm_ofnode_pre_reloc(offset_to_ofnode(offset)))
+		    !ofnode_pre_reloc(offset_to_ofnode(offset)))
 			continue;
 		/*
 		 * If this node has "compatible" property, this is not