block/cfq: set the group_idle value to zero too

* Commit 1b531b3 sets slice_idle to 0, but it also makes sense for group_idle

Author: ExactExampl

block/cfq-iosched.c

@@ -31,7 +31,7 @@ static const u64 cfq_slice_sync = NSEC_PER_SEC / 10;
 static u64 cfq_slice_async = NSEC_PER_SEC / 25;
 static const int cfq_slice_async_rq = 2;
 static u64 cfq_slice_idle = 0;
-static u64 cfq_group_idle = NSEC_PER_SEC / 125;
+static u64 cfq_group_idle = 0;
 static const u64 cfq_target_latency = (u64)NSEC_PER_SEC * 3/10; /* 300 ms */
 static const int cfq_hist_divisor = 4;