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/t104xrdb/t104xrdb.c b/board/freescale/t104xrdb/t104xrdb.c
index ec97677..6bad6a454 100644
--- a/board/freescale/t104xrdb/t104xrdb.c
+++ b/board/freescale/t104xrdb/t104xrdb.c
@@ -144,7 +144,7 @@
 	fdt_fixup_liodn(blob);
 
 #ifdef CONFIG_HAS_FSL_DR_USB
-	fdt_fixup_dr_usb(blob, bd);
+	fsl_fdt_fixup_dr_usb(blob, bd);
 #endif
 
 #ifdef CONFIG_SYS_DPAA_FMAN