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/p1_twr/p1_twr.c b/board/freescale/p1_twr/p1_twr.c
index a40bea3..f54a6ff 100644
--- a/board/freescale/p1_twr/p1_twr.c
+++ b/board/freescale/p1_twr/p1_twr.c
@@ -282,7 +282,7 @@
 #if defined(CONFIG_TWR_P1025)
 	fdt_board_fixup_qe_pins(blob);
 #endif
-	fdt_fixup_dr_usb(blob, bd);
+	fsl_fdt_fixup_dr_usb(blob, bd);
 
 	return 0;
 }