feat(ff-a): introduce count flag to ffa_partition_info_get

The partition count flag controls whether to return partition
info descriptors on a call to FFA_PARTITION_INFO_GET. This
patch introduces this functionality.

Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
Change-Id: Ib4a13c10e107daf726e5d6ec0ce6bd0d451c1b0f
diff --git a/inc/hf/api.h b/inc/hf/api.h
index 640c980..13fe923 100644
--- a/inc/hf/api.h
+++ b/inc/hf/api.h
@@ -59,7 +59,8 @@
 struct ffa_value api_ffa_version(struct vcpu *current,
 				 uint32_t requested_version);
 struct ffa_value api_ffa_partition_info_get(struct vcpu *current,
-					    const struct ffa_uuid *uuid);
+					    const struct ffa_uuid *uuid,
+					    const uint32_t flags);
 struct ffa_value api_ffa_id_get(const struct vcpu *current);
 struct ffa_value api_ffa_spm_id_get(void);
 struct ffa_value api_ffa_feature_success(uint32_t arg2);
diff --git a/inc/hf/arch/plat/ffa.h b/inc/hf/arch/plat/ffa.h
index b26524f..3a78182 100644
--- a/inc/hf/arch/plat/ffa.h
+++ b/inc/hf/arch/plat/ffa.h
@@ -222,5 +222,6 @@
 	struct vcpu *next, struct vcpu *current);
 
 void plat_ffa_partition_info_get_forward(const struct ffa_uuid *uuid,
+					 const uint32_t flags,
 					 struct ffa_partition_info *partitions,
 					 ffa_vm_count_t *ret_count);