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/mpc8315erdb/mpc8315erdb.c b/board/freescale/mpc8315erdb/mpc8315erdb.c
index ed611c5..3cec09b 100644
--- a/board/freescale/mpc8315erdb/mpc8315erdb.c
+++ b/board/freescale/mpc8315erdb/mpc8315erdb.c
@@ -194,7 +194,7 @@
 #ifdef CONFIG_PCI
 	ft_pci_setup(blob, bd);
 #endif
-	fdt_fixup_dr_usb(blob, bd);
+	fsl_fdt_fixup_dr_usb(blob, bd);
 	fdt_tsec1_fixup(blob, bd);
 
 	return 0;