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/p2041rdb/p2041rdb.c b/board/freescale/p2041rdb/p2041rdb.c
index c6a7242..21fb66f 100644
--- a/board/freescale/p2041rdb/p2041rdb.c
+++ b/board/freescale/p2041rdb/p2041rdb.c
@@ -225,7 +225,7 @@
 	fdt_fixup_memory(blob, (u64)base, (u64)size);
 
 #if defined(CONFIG_HAS_FSL_DR_USB) || defined(CONFIG_HAS_FSL_MPH_USB)
-	fdt_fixup_dr_usb(blob, bd);
+	fsl_fdt_fixup_dr_usb(blob, bd);
 #endif
 
 #ifdef CONFIG_PCI