cciss: select CONFIG_CHECK_SIGNATURE

cciss: select CONFIG_CHECK_SIGNATURE

The patch cciss-use-check_signature.patch in -mm tree introduced
a build error:

drivers/built-in.o: In function `CISS_signature_present':
drivers/block/cciss.c:4270: undefined reference to `check_signature'

Add missing CONFIG_CHECK_SIGNATURE to fix this issue.

Reported-by: Fengguang Wu <[email protected]>
Signed-off-by: Akinobu Mita <[email protected]>
Cc: Fengguang Wu <[email protected]>
Cc: Mike Miller <[email protected]>
Cc: Jens Axboe <[email protected]>
Acked-by: "Stephen M. Cameron" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>