opteed: pass device tree pointer in x2

Pass device tree pointer to OP-TEE in x2. bl2 is expected to fill in the
device tree pointer in args.arg3. Passing 0 means that device tree is
unavailable.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
diff --git a/services/spd/opteed/opteed_private.h b/services/spd/opteed/opteed_private.h
index 11c1a1f..6cda2c8 100644
--- a/services/spd/opteed/opteed_private.h
+++ b/services/spd/opteed/opteed_private.h
@@ -149,6 +149,7 @@
 				uint64_t pc,
 				uint64_t pageable_part,
 				uint64_t mem_limit,
+				uint64_t dt_addr,
 				optee_context_t *optee_ctx);
 
 extern optee_context_t opteed_sp_context[OPTEED_CORE_COUNT];