Refactor FF-A boot info

Refactor the FF-A boot info related types to prepare for adding the FF-A
v1.1 structures.

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: I03dd0275d367611e6156c4ba47bdbacb62296001
diff --git a/components/messaging/ffa/libsp/include/sp_api.h b/components/messaging/ffa/libsp/include/sp_api.h
index 3c432bb..b220c91 100644
--- a/components/messaging/ffa/libsp/include/sp_api.h
+++ b/components/messaging/ffa/libsp/include/sp_api.h
@@ -30,9 +30,9 @@
  * @brief      Entry point of the SP's application code. SPs must implement this
  *             function.
  *
- * @param      init_info  The boot info
+ * @param      boot_info  The boot info
  */
-void __noreturn sp_main(struct ffa_init_info *init_info);
+void __noreturn sp_main(union ffa_boot_info *boot_info);
 
 #ifdef __cplusplus
 }