cifs: remove redundant assignment to the variable match

The variable match is being assigned a value that is never read, it
is being re-assigned a new value later on. The assignment is redundant
and can be removed.

Cleans up clang scan-build warning:
fs/cifs/dfs_cache.c:1302:2: warning: Value stored to 'match' is never read

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>