i.MX31: Add hw-random for RNGA

This hw-random driver add support to RNGA hardware found
on some i.MX processors.

Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index 5fab647..26c93c7 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -148,3 +148,15 @@
 
 	  To compile this driver as a module, choose M here: the
 	  module will be called virtio-rng.  If unsure, say N.
+
+config HW_RANDOM_MXC_RNGA
+	tristate "Freescale i.MX RNGA Random Number Generator"
+	depends on HW_RANDOM && ARCH_HAS_RNGA
+	---help---
+	  This driver provides kernel-side support for the Random Number
+	  Generator hardware found on Freescale i.MX processors.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called mxc-rnga.
+
+	  If unsure, say Y.