ARM: 8421/1: smp: Collapse arch_cpu_idle_dead() into cpu_die()

The only caller of cpu_die() on ARM is arch_cpu_idle_dead(), so
let's simplify the code by renaming cpu_die() to
arch_cpu_idle_dead(). While were here, drop the __ref annotation
because __cpuinit is gone nowadays.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/process.c

@@ -91,13 +91,6 @@ void arch_cpu_idle_exit(void)
 	ledtrig_cpu(CPU_LED_IDLE_END);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
-void arch_cpu_idle_dead(void)
-{
-	cpu_die();
-}
-#endif
-
 void __show_regs(struct pt_regs *regs)
 {
 	unsigned long flags;