grlib and users: Fix function cast warnings

grlib has places where a function similar to memcpy() can be
provided by the driver. The signature does not match memcpy()
which led to function cast warnings when memcpy() was sufficient.
Provided a wrapper function to aligned the signatures.

bsps/shared/grlib/amba/ambapp.c

@@ -303,8 +303,18 @@ static int ambapp_scan2(
   return 0;
 }
 
+static void *ambapp_memcpy(
+  void *dest,
+  const void *src,
+  int n,
+  struct ambapp_bus *abus RTEMS_UNUSED
+)
+{
+  return memcpy(dest, src, n);
+}
+
 static const struct ambapp_context default_ctx = {
-  .copy_from_device = (ambapp_memcpy_t)memcpy,
+  .copy_from_device = ambapp_memcpy,
   .alloc = rtems_malloc
 };
 

bsps/shared/grlib/spw/grspw_pkt.c

@@ -3285,6 +3285,14 @@ int grspw_isr_affinity(void *d, const cpu_set_t *cpus)
 }
 #endif
 
+static int grspw_msgqisr(void *data, unsigned int *buf, unsigned int n)
+{
+  rtems_status_code sc;
+
+  sc = rtems_message_queue_send((rtems_id) data, buf, n);
+  return sc.
+}
+
 static int grspw_common_init(void)
 {
 	if (grspw_initialized == 1)
@@ -3308,8 +3316,7 @@ static int grspw_common_init(void)
 			(rtems_id *)&grspw_wc_def.msgisr_arg, 0);
 		if (grspw_work_task == OBJECTS_ID_NONE)
 			return -2;
-		grspw_wc_def.msgisr =
-			(grspw_msgqisr_t) rtems_message_queue_send;
+		grspw_wc_def.msgisr = grspw_msgqisr;
 	} else {
 		grspw_wc_def.msgisr = NULL;
 		grspw_wc_def.msgisr_arg = NULL;

bsps/sparc/leon3/start/amba.c

@@ -64,6 +64,16 @@ static void *ambapp_plb_alloc( size_t size )
   return _Memory_Allocate( _Memory_Get(), size, CPU_HEAP_ALIGNMENT );
 }
 
+static void *ambapp_memcpy(
+  void *dest,
+  const void *src,
+  int n,
+  struct ambapp_bus *abus RTEMS_UNUSED
+)
+{
+  return memcpy(dest, src, n);
+}
+
 struct ambapp_bus *ambapp_plb( void )
 {
   struct ambapp_bus *plb;
@@ -73,7 +83,7 @@ struct ambapp_bus *ambapp_plb( void )
   if ( plb->root == NULL ) {
     struct ambapp_context ctx;
 
-    ctx.copy_from_device = (ambapp_memcpy_t) memcpy;
+    ctx.copy_from_device = ambapp_memcpy;
     ctx.alloc = ambapp_plb_alloc;
 
     /* Scan AMBA Plug&Play read-only information. The routine builds a PnP