Some arch's can't handle sched_clock() being called too early - delay
this until sched_clock_init() has been called.
Reported-by: NBill Gatliff <bgat@billgatliff.com>
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: NNishanth Aravamudan <nacc@us.ibm.com>
CC: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: NIngo Molnar <mingo@elte.hu>