m32r: use generic current.h

Given that the arch does not add its own implementations, simply
use the asm-generic/current.h (generic-y) header instead of
duplicating code.

Link: http://lkml.kernel.org/r/1482896994-25863-1-git-send-email-dave@stgolabs.netSigned-off-by: NDavidlohr Bueso <dbueso@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/m32r/include/asm/Kbuild

 
 generic-y += clkdev.h
+generic-y += current.h
 generic-y += exec.h
 generic-y += irq_work.h
 generic-y += kvm_para.h

arch/m32r/include/asm/current.h

-#ifndef _ASM_M32R_CURRENT_H
-#define _ASM_M32R_CURRENT_H
-
-#include <linux/thread_info.h>
-
-struct task_struct;
-
-static __inline__ struct task_struct *get_current(void)
-{
-	return current_thread_info()->task;
-}
-
-#define current	(get_current())
-
-#endif	/* _ASM_M32R_CURRENT_H */