This function isn't used outside of tick-broadcast.c, so let's
mark it static.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Link: http://lkml.kernel.org/r/20170608063603.13276-1-sboyd@codeaurora.orgSigned-off-by: NThomas Gleixner <tglx@linutronix.de>