kvm: replace cond_resched() with schedule()

	This commit tries to fix qemu CPU soft-lock while using
	>=2 vCPU per guest with BFS enabled. The trick is stolen
	from here:
	https://bugzilla.redhat.com/show_bug.cgi?id=1038929#c5
Merge branch 'ck-3.14' into pf-3.14