powerpc/time: move timer_broadcast_interrupt prototype to asm/time.h

Interrupt handler prototypes are going to be rearranged in a
future patch, so tidy this out of the way first.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210130130852.2952424-21-npiggin@gmail.com

arch/powerpc/include/asm/hw_irq.h

@@ -54,7 +54,6 @@ extern void replay_system_reset(void);
 extern void replay_soft_interrupts(void);
 
 extern void timer_interrupt(struct pt_regs *);
-extern void timer_broadcast_interrupt(void);
 extern void performance_monitor_exception(struct pt_regs *regs);
 extern void WatchdogException(struct pt_regs *regs);
 extern void unknown_exception(struct pt_regs *regs);

arch/powerpc/include/asm/time.h

@@ -102,6 +102,8 @@ DECLARE_PER_CPU(u64, decrementers_next_tb);
 /* Convert timebase ticks to nanoseconds */
 unsigned long long tb_to_ns(unsigned long long tb_ticks);
 
+void timer_broadcast_interrupt(void);
+
 /* SPLPAR */
 void accumulate_stolen_time(void);