fix(interrupts): deny new direct request message from endpoint

Please refer to detailed description in the comment preceding the
helper function introduced in cactus_interrupt.c file.

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: Ie70d68514dac44211767d611db6d84991a8b48c6
diff --git a/spm/cactus/cactus_tests/cactus_test_interrupts.c b/spm/cactus/cactus_tests/cactus_test_interrupts.c
index c438050..7f3de0c 100644
--- a/spm/cactus/cactus_tests/cactus_test_interrupts.c
+++ b/spm/cactus/cactus_tests/cactus_test_interrupts.c
@@ -82,8 +82,8 @@
 			 */
 			VERBOSE("SP%x: received Managed Exit as response\n",
 				vm_id);
-			ffa_ret = ffa_msg_send_direct_req64(vm_id, fwd_dest,
-							    0, 0, 0, 0, 0);
+			ffa_ret = cactus_resume_after_managed_exit(vm_id,
+								   fwd_dest);
 		}
 	}