plat/brcm: Define RNG base address

Change-Id: I4f5efcd7638a25c317382b51f05e6b9aa283d068
Signed-off-by: Roman Bacik <roman.bacik@broadcom.com>
Signed-off-by: Bharat Gooty <bharat.gooty@broadcom.com>

plat/brcm/board/stingray/include/sr_def.h

@@ -291,6 +291,11 @@
 #define ICFG_PKA_MEM_PWR_CTRL__ARRPOWEROKOUT	BIT(7)
 #define ICFG_PKA_MEM_PWR_CTRL__ISO		BIT(8)
 
+/*******************************************************************************
+ * RNG constants
+ ******************************************************************************/
+#define RNG_BASE_ADDR			0x68b20000
+
 /*******************************************************************************
  * Trusted Watchdog constants
  ******************************************************************************/