common: Fix up malloc() comment in reserve_noncached()

The function name has changed, so update it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
diff --git a/common/board_f.c b/common/board_f.c
index f1bd70f..a87411e 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -501,9 +501,9 @@
 static int reserve_noncached(void)
 {
 	/*
-	 * The value of gd->start_addr_sp must match the value of malloc_start
-	 * calculated in board_r.c:initr_malloc(), which is passed to
-	 * dlmalloc.c:mem_malloc_init() and then used by
+	 * The value of gd->start_addr_sp must match the value of
+	 * mem_malloc_start calculated in board_r.c:initr_malloc(), which is
+	 * passed to dlmalloc.c:mem_malloc_init() and then used by
 	 * cache.c:noncached_init()
 	 *
 	 * These calculations must match the code in cache.c:noncached_init()