fix typos "wich" -> "which"

Signed-off-by: Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/fs/befs/datastream.c b/fs/befs/datastream.c
index 785f6b2..b7d6b92 100644
--- a/fs/befs/datastream.c
+++ b/fs/befs/datastream.c
@@ -118,7 +118,7 @@
  * befs_read_lsmylink - read long symlink from datastream.
  * @sb: Filesystem superblock 
  * @ds: Datastrem to read from
- * @buf: Buffer in wich to place long symlink data
+ * @buf: Buffer in which to place long symlink data
  * @len: Length of the long symlink in bytes
  *
  * Returns the number of bytes read