m32r: Remove pointless function prototypes

Already declared in include/linux/smp.h
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Link: http://lkml.kernel.org/r/20120420124556.899547554@linutronix.de

arch/m32r/kernel/smpboot.c

@@ -109,12 +109,8 @@ static unsigned int calibration_result;
 /* Function Prototypes                                                       */
 /*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*/
 
-void smp_prepare_boot_cpu(void);
-void smp_prepare_cpus(unsigned int);
 static void init_ipi_lock(void);
 static void do_boot_cpu(int);
-int __cpu_up(unsigned int);
-void smp_cpus_done(unsigned int);
 
 int start_secondary(void *);
 static void smp_callin(void);