usb: fsl: Rename fdt_fixup_dr_usb

The function fdt_fixup_dr_usb is specific to fsl/nxp. So,
make the function name explicit and rename fdt_fixup_dr_usb
into fsl_fdt_fixup_dr_usb.

Signed-off-by: Sriram Dash <sriram.dash@nxp.com>
diff --git a/board/freescale/mpc837xemds/mpc837xemds.c b/board/freescale/mpc837xemds/mpc837xemds.c
index 572913c..045841d 100644
--- a/board/freescale/mpc837xemds/mpc837xemds.c
+++ b/board/freescale/mpc837xemds/mpc837xemds.c
@@ -332,7 +332,7 @@
 {
 	ft_cpu_setup(blob, bd);
 	ft_tsec_fixup(blob, bd);
-	fdt_fixup_dr_usb(blob, bd);
+	fsl_fdt_fixup_dr_usb(blob, bd);
 	fdt_fixup_esdhc(blob, bd);
 #ifdef CONFIG_PCI
 	ft_pci_setup(blob, bd);