bfq: Use 'ttime' local variable

Use local variable 'ttime' instead of dereferencing bfqq.

Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
1 file changed