refactor: rename type for FF-A IDs

The FF-A ID is a unsigned 16-bit value that was named
ffa_vm_id_t. This patch changes it to simply ffa_id_t.
This is to make clearer the ID type is used for other
endpoints other than simply VMs.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I60319c08481b2380bd0063b108a35fc01e2af537
diff --git a/inc/hf/ffa_memory_internal.h b/inc/hf/ffa_memory_internal.h
index 27608ed..5f4a522 100644
--- a/inc/hf/ffa_memory_internal.h
+++ b/inc/hf/ffa_memory_internal.h
@@ -172,7 +172,7 @@
 	uint32_t *orig_from_mode_ret);
 struct ffa_value ffa_memory_send_continue_validate(
 	struct share_states_locked share_states, ffa_memory_handle_t handle,
-	struct ffa_memory_share_state **share_state_ret, ffa_vm_id_t from_vm_id,
+	struct ffa_memory_share_state **share_state_ret, ffa_id_t from_vm_id,
 	struct mpool *page_pool);
 struct ffa_value ffa_retrieve_check_transition(
 	struct vm_locked to, uint32_t share_func,
@@ -180,13 +180,13 @@
 	uint32_t *fragment_constituent_counts, uint32_t fragment_count,
 	uint32_t memory_to_attributes, uint32_t *to_mode);
 struct ffa_value ffa_retrieve_check_update(
-	struct vm_locked to_locked, ffa_vm_id_t from_id,
+	struct vm_locked to_locked, ffa_id_t from_id,
 	struct ffa_memory_region_constituent **fragments,
 	uint32_t *fragment_constituent_counts, uint32_t fragment_count,
 	uint32_t memory_to_attributes, uint32_t share_func, bool clear,
 	struct mpool *page_pool);
 uint32_t ffa_memory_region_get_receiver(struct ffa_memory_region *memory_region,
-					ffa_vm_id_t receiver);
+					ffa_id_t receiver);
 bool ffa_region_group_identity_map(
 	struct vm_locked vm_locked,
 	struct ffa_memory_region_constituent **fragments,