feat(memory share): FFA_FEATURES(FFA_MEM_RETRIEVE_REQ)

Updates tests to pass when built against
https://review.trustedfirmware.org/c/hafnium/hafnium/+/18909

Signed-off-by: Karl Meakin <karl.meakin@arm.com>
Change-Id: Ic6c39ca6916b9f9298d7668021963fec287b72c8
diff --git a/include/runtime_services/ffa_helpers.h b/include/runtime_services/ffa_helpers.h
index 3da5c18..8ca51d3 100644
--- a/include/runtime_services/ffa_helpers.h
+++ b/include/runtime_services/ffa_helpers.h
@@ -664,6 +664,8 @@
 struct ffa_value ffa_msg_wait(void);
 struct ffa_value ffa_error(int32_t error_code);
 struct ffa_value ffa_features(uint32_t feature);
+struct ffa_value ffa_features_with_input_property(uint32_t feature,
+                                                  uint32_t param);
 struct ffa_value ffa_partition_info_get(const struct ffa_uuid uuid);
 struct ffa_value ffa_rx_release(void);
 struct ffa_value ffa_rxtx_map(uintptr_t send, uintptr_t recv, uint32_t pages);