The 32 bit sched_clock interface supports 64 bits since 3.13-rc1.
Upgrade to the 64 bit function to allow us to remove the 32 bit
registration interface.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>