[ARM] orion: add hwrng timeriomem hook to TS-78xx

Add hook so that the HW RNG source on the TS-78xx is available.

Signed-off-by: Alexander Clouter <alex@digriz.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/arch/arm/mach-orion5x/ts78xx-fpga.h b/arch/arm/mach-orion5x/ts78xx-fpga.h
index 0f9cdf4..37b3d48 100644
--- a/arch/arm/mach-orion5x/ts78xx-fpga.h
+++ b/arch/arm/mach-orion5x/ts78xx-fpga.h
@@ -25,6 +25,7 @@
 	/* Technologic Systems */
 	struct fpga_device 	ts_rtc;
 	struct fpga_device 	ts_nand;
+	struct fpga_device 	ts_rng;
 };
 
 struct ts78xx_fpga_data {