refactor(ffa): remove `plat` prefix

Rename files to remove the `plat` prefix and replace with a
module-specific prefix.

Change-Id: Ie64cefcdf91da7b20e520828d8e234af12ab5c85
Signed-off-by: Karl Meakin <karl.meakin@arm.com>
diff --git a/inc/hf/ffa/vm.h b/inc/hf/ffa/vm.h
index 226ae06..1710afb 100644
--- a/inc/hf/ffa/vm.h
+++ b/inc/hf/ffa/vm.h
@@ -10,28 +10,27 @@
 
 #include "hf/vm.h"
 
-void plat_ffa_disable_vm_interrupts(struct vm_locked vm_locked);
+void ffa_vm_disable_interrupts(struct vm_locked vm_locked);
 
-void plat_ffa_vm_init(struct mpool *ppool);
+void ffa_vm_init(struct mpool *ppool);
 
-struct vm_locked plat_ffa_nwd_vm_create(ffa_id_t vm_id);
+struct vm_locked ffa_vm_nwd_create(ffa_id_t vm_id);
 
-bool plat_ffa_vm_supports_indirect_messages(struct vm *vm);
+bool ffa_vm_supports_indirect_messages(struct vm *vm);
 
-bool plat_ffa_vm_notifications_info_get(uint16_t *ids, uint32_t *ids_count,
-					uint32_t *lists_sizes,
-					uint32_t *lists_count,
-					uint32_t ids_count_max);
+bool ffa_vm_notifications_info_get(uint16_t *ids, uint32_t *ids_count,
+				   uint32_t *lists_sizes, uint32_t *lists_count,
+				   uint32_t ids_count_max);
 
 /** Get NWd VM's structure. */
-struct vm_locked plat_ffa_vm_find_locked(ffa_id_t vm_id);
+struct vm_locked ffa_vm_find_locked(ffa_id_t vm_id);
 
-struct vm_locked plat_ffa_vm_find_locked_create(ffa_id_t vm_id);
+struct vm_locked ffa_vm_find_locked_create(ffa_id_t vm_id);
 
-void plat_ffa_vm_destroy(struct vm_locked to_destroy_locked);
+void ffa_vm_destroy(struct vm_locked to_destroy_locked);
 
 /** Reclaim all resources belonging to VM in aborted state. */
-void plat_ffa_free_vm_resources(struct vm_locked vm_locked);
+void ffa_vm_free_resources(struct vm_locked vm_locked);
 
 /** Checks whether managed exit is supported by given SP. */
-bool plat_ffa_vm_managed_exit_supported(struct vm *vm);
+bool ffa_vm_managed_exit_supported(struct vm *vm);