[RFC V6 3/3] arm64:add bitrev.h file to support rbit instruction

[Wang, Yalin]

> From: Will Deacon [mailto:will.deacon at arm.com]
> > +#ifndef __ASM_ARM64_BITREV_H
> > +#define __ASM_ARM64_BITREV_H
> 
> Really minor nit, but we don't tend to include 'ARM64' in our header guards,
> so this should just be __ASM_BITREV_H.
> 
> With that change,
> 
>   Acked-by: Will Deacon <will.deacon at arm.com>
> 
I have send the patch to the patch system:
http://www.arm.linux.org.uk/developer/patches/search.php?uid=4025

8187/1 8188/1 8189/1

Just remind you that , should also cherry-pick Joe Perches's 
2 patches:
[PATCH] 6fire: Convert byte_rev_table uses to bitrev8
[PATCH] carl9170: Convert byte_rev_table uses to bitrev8

To make sure there is no build error when build these 2 drivers.

Thanks