83xx/fdt_support: let user specifiy FSL USB Dual-Role controller role

Linux understands "host" (default), "peripheral" and "otg" (broken).
Though, U-Boot doesn't restrict dr_mode variable to these values (think
of renames in future).

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 5ef6983..890993f 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -50,6 +50,12 @@
 			 const void *val, int len, int create);
 void fdt_fixup_qe_firmware(void *fdt);
 
+#ifdef CONFIG_HAS_FSL_DR_USB
+void fdt_fixup_dr_usb(void *blob, bd_t *bd);
+#else
+static inline void fdt_fixup_dr_usb(void *blob, bd_t *bd) {}
+#endif /* CONFIG_HAS_FSL_DR_USB */
+
 #ifdef CONFIG_OF_BOARD_SETUP
 void ft_board_setup(void *blob, bd_t *bd);
 void ft_cpu_setup(void *blob, bd_t *bd);