[CIFS] rename cifs_strndup to cifs_strndup_from_ucs

In most cases, cifs_strndup is converting from Unicode (UCS2 / UTF-32) to
the configured local code page for the Linux mount (usually UTF8), so
Jeff suggested that to make it more clear that cifs_strndup is doing
a conversion not just memory allocation and copy, rename the function
to including "from_ucs" (ie Unicode)

Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 2a879cf..6382720 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -1,7 +1,7 @@
 /*
  *   fs/cifs/cifs_unicode.c
  *
- *   Copyright (c) International Business Machines  Corp., 2000,2005
+ *   Copyright (c) International Business Machines  Corp., 2000,2009
  *   Modified by Steve French (sfrench@us.ibm.com)
  *
  *   This program is free software;  you can redistribute it and/or modify
@@ -244,7 +244,7 @@
 }
 
 /*
- * cifs_strndup - copy a string from wire format to the local codepage
+ * cifs_strndup_from_ucs - copy a string from wire format to the local codepage
  * @src - source string
  * @maxlen - don't walk past this many bytes in the source string
  * @is_unicode - is this a unicode string?
@@ -255,7 +255,7 @@
  * error.
  */
 char *
-cifs_strndup(const char *src, const int maxlen, const bool is_unicode,
+cifs_strndup_from_ucs(const char *src, const int maxlen, const bool is_unicode,
 	     const struct nls_table *codepage)
 {
 	int len;