ARM: shmobile: Remove unused hotplug.c

Each CPU Hotplug implementation for mach-shmobile
is now self-contained, so this change removes unused
helper code in hotplug.c. The two CPU Hotplug capable
SoCs sh73a0 and r8a7779 remain unchanged.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/Makefile

@@ -14,7 +14,6 @@ obj-$(CONFIG_ARCH_EMEV2)	+= setup-emev2.o clock-emev2.o
 
 # SMP objects
 smp-y				:= platsmp.o headsmp.o
-smp-$(CONFIG_HOTPLUG_CPU)	+= hotplug.o
 smp-$(CONFIG_ARCH_SH73A0)	+= smp-sh73a0.o headsmp-scu.o
 smp-$(CONFIG_ARCH_R8A7779)	+= smp-r8a7779.o headsmp-scu.o
 smp-$(CONFIG_ARCH_EMEV2)	+= smp-emev2.o headsmp-scu.o

arch/arm/mach-shmobile/include/mach/common.h

@@ -85,16 +85,6 @@ int shmobile_cpuidle_init(void);
 static inline int shmobile_cpuidle_init(void) { return 0; }
 #endif
 
-extern void shmobile_cpu_die(unsigned int cpu);
-extern int shmobile_cpu_disable(unsigned int cpu);
-extern int shmobile_cpu_disable_any(unsigned int cpu);
-
-#ifdef CONFIG_HOTPLUG_CPU
-extern int shmobile_cpu_is_dead(unsigned int cpu);
-#else
-static inline int shmobile_cpu_is_dead(unsigned int cpu) { return 1; }
-#endif
-
 extern void __iomem *shmobile_scu_base;
 extern void shmobile_smp_init_cpus(unsigned int ncores);