f2fs: adjust kernel coding style

As pointed out by Randy Dunlap, this patch removes all usage of "/**" for comment
blocks. Instead, just use "/*".

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index aec362f..63efd77 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1,4 +1,4 @@
-/**
+/*
  * fs/f2fs/namei.c
  *
  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
@@ -96,7 +96,7 @@
 	return ret;
 }
 
-/**
+/*
  * Set multimedia files as cold files for hot/cold data separation
  */
 static inline void set_cold_file(struct f2fs_sb_info *sbi, struct inode *inode,