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/inc/hf/api.h b/inc/hf/api.h
index f17f1fb..929fe52 100644
--- a/inc/hf/api.h
+++ b/inc/hf/api.h
@@ -41,8 +41,7 @@
 
 struct ffa_value api_ffa_msg_send(ffa_vm_id_t sender_vm_id,
 				  ffa_vm_id_t receiver_vm_id, uint32_t size,
-				  uint32_t attributes, struct vcpu *current,
-				  struct vcpu **next);
+				  struct vcpu *current, struct vcpu **next);
 struct ffa_value api_ffa_msg_send2(ffa_vm_id_t sender_vm_id, uint32_t flags,
 				   struct vcpu *current);
 struct ffa_value api_ffa_msg_recv(bool block, struct vcpu *current,
diff --git a/inc/vmapi/hf/ffa.h b/inc/vmapi/hf/ffa.h
index 7fe1f50..8d6d59c 100644
--- a/inc/vmapi/hf/ffa.h
+++ b/inc/vmapi/hf/ffa.h
@@ -367,11 +367,6 @@
 	return args.arg3;
 }
 
-static inline uint32_t ffa_msg_send_attributes(struct ffa_value args)
-{
-	return args.arg4;
-}
-
 static inline uint32_t ffa_msg_send2_flags(struct ffa_value args)
 {
 	return args.arg2;