sched: don't clear PF_VCPU in scheduler

KVM clears it by itself now, and for s390 this is plain wrong.

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Avi Kivity <avi@qumranet.com>
diff --git a/kernel/sched.c b/kernel/sched.c
index 7581e33..2810e56 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3375,7 +3375,6 @@
 
 	if (p->flags & PF_VCPU) {
 		account_guest_time(p, cputime);
-		p->flags &= ~PF_VCPU;
 		return;
 	}