Blackfin: SMP: implement cpu_freq support

Re-use some of the existing cpu hotplugging code in the process.

Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/include/asm/smp.h b/arch/blackfin/include/asm/smp.h
index f5b5379..9dd4873 100644
--- a/arch/blackfin/include/asm/smp.h
+++ b/arch/blackfin/include/asm/smp.h
@@ -34,7 +34,7 @@
 void smp_icache_flush_range_others(unsigned long start,
 				   unsigned long end);
 #ifdef CONFIG_HOTPLUG_CPU
-void coreb_sleep(u32 sic_iwr0, u32 sic_iwr1, u32 sic_iwr2);
+void coreb_die(void);
 void cpu_die(void);
 void platform_cpu_die(void);
 int __cpu_disable(void);