Blackfin: SMP: drop unused blackfin_cpudata.idle pointer

Not sure when we stopped using this field, but nothing in the tree uses
this now, so punt it.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

arch/blackfin/include/asm/cpu.h

@@ -10,11 +10,8 @@
 
 #include <linux/percpu.h>
 
-struct task_struct;
-
 struct blackfin_cpudata {
 	struct cpu cpu;
-	struct task_struct *idle;
 	unsigned int imemctl;
 	unsigned int dmemctl;
 };

arch/blackfin/kernel/setup.c

@@ -165,7 +165,6 @@ void __cpuinit bfin_setup_cpudata(unsigned int cpu)
 {
 	struct blackfin_cpudata *cpudata = &per_cpu(cpu_data, cpu);
 
-	cpudata->idle = current;
 	cpudata->imemctl = bfin_read_IMEM_CONTROL();
 	cpudata->dmemctl = bfin_read_DMEM_CONTROL();
 }