malloc_simple: Add a little more debugging

Output the pointer returned by each call to malloc(). This can be useful
when debugging memory problems.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

common/malloc_simple.c

@@ -19,12 +19,15 @@ void *malloc_simple(size_t bytes)
 	void *ptr;
 
 	new_ptr = gd->malloc_ptr + bytes;
-	debug("%s: size=%zx, ptr=%lx, limit=%lx\n", __func__, bytes, new_ptr,
+	debug("%s: size=%zx, ptr=%lx, limit=%lx: ", __func__, bytes, new_ptr,
 	      gd->malloc_limit);
-	if (new_ptr > gd->malloc_limit)
+	if (new_ptr > gd->malloc_limit) {
+		debug("space exhausted\n");
 		return NULL;
+	}
 	ptr = map_sysmem(gd->malloc_base + gd->malloc_ptr, bytes);
 	gd->malloc_ptr = ALIGN(new_ptr, sizeof(new_ptr));
+	debug("%lx\n", (ulong)ptr);
 
 	return ptr;
 }