driver: brcm: add RNG driver

Signed-off-by: Bharat Gooty <bharat.gooty@broadcom.com>
Change-Id: I490d7e4d49bd9f5a62d343a264a1e14c2066ceca
diff --git a/plat/brcm/board/common/board_common.mk b/plat/brcm/board/common/board_common.mk
index 808a107..3069f91 100644
--- a/plat/brcm/board/common/board_common.mk
+++ b/plat/brcm/board/common/board_common.mk
@@ -133,6 +133,12 @@
 				plat/brcm/board/common/sbl_util.c \
 				drivers/arm/sp805/sp805.c
 
+# Add RNG driver
+DRIVER_RNG_ENABLE := 1
+ifeq (${DRIVER_RNG_ENABLE},1)
+PLAT_BL_COMMON_SOURCES	+=	drivers/brcm/rng.c
+endif
+
 # Add eMMC driver
 ifeq (${DRIVER_EMMC_ENABLE},1)
 $(eval $(call add_define,DRIVER_EMMC_ENABLE))