feat: remove waiter list

FF-A v1.1 deprecate FFA_MSG_SEND ABI and the notification feature in
case of busy receiver.

Change-Id: I30ad97930f872ac097d398085621d1e3e2bee15f
Signed-off-by: Federico Recanati <federico.recanati@arm.com>
diff --git a/src/arch/aarch64/hypervisor/handler.c b/src/arch/aarch64/hypervisor/handler.c
index 0ee37d6..0d46b66 100644
--- a/src/arch/aarch64/hypervisor/handler.c
+++ b/src/arch/aarch64/hypervisor/handler.c
@@ -515,9 +515,8 @@
 		return true;
 	case FFA_MSG_SEND_32:
 		*args = api_ffa_msg_send(ffa_sender(*args), ffa_receiver(*args),
-					 ffa_msg_send_size(*args),
-					 ffa_msg_send_attributes(*args),
-					 current, next);
+					 ffa_msg_send_size(*args), current,
+					 next);
 		return true;
 	case FFA_MSG_SEND2_32:
 		*args = api_ffa_msg_send2(ffa_sender(*args),