[SPARC64]: Kill off dummy_tick_ops.

It only serves to generate false-positive buildcheck warnings.
Just set it initially to tick_operations which uses the v9
%tick register which every sparc64 processor has.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/time.c

@@ -60,17 +60,6 @@ static void __iomem *mstk48t59_regs;
 
 static int set_rtc_mmss(unsigned long);
 
-static __init unsigned long dummy_get_tick(void)
-{
-	return 0;
-}
-
-static __initdata struct sparc64_tick_ops dummy_tick_ops = {
-	.get_tick	= dummy_get_tick,
-};
-
-struct sparc64_tick_ops *tick_ops __read_mostly = &dummy_tick_ops;
-
 #define TICK_PRIV_BIT	(1UL << 63)
 
 #ifdef CONFIG_SMP
@@ -200,6 +189,8 @@ static struct sparc64_tick_ops tick_operations __read_mostly = {
 	.softint_mask	=	1UL << 0,
 };
 
+struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations;
+
 static void stick_init_tick(unsigned long offset)
 {
 	tick_disable_protection();