sparc:remove unused declaration smp_boot_cpus()

smp_boot_cpus() was replaced smp_prepare_cpus() long ago, and it no
longer needed, so delete it.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/smp_32.h

@@ -46,7 +46,6 @@ void sun4m_init_smp(void);
 void sun4d_init_smp(void);
 
 void smp_callin(void);
-void smp_boot_cpus(void);
 void smp_store_cpu_info(int);
 
 void smp_resched_interrupt(void);