[U-Boot] [U-Boot, v4, 1/2] linux/compat.h: port lower_32_bits and upper_32_bits from Linux

[Tom Rini]

On Fri, Jun 20, 2014 at 12:17:29PM -0500, Lijun Pan wrote:

> [backport from linux commit 204b885e and 218e180e7]
> 64 bit processors are becomming more and more popular.
> lower_32_bits and upper_32_bits save our labor doing
> shifts/manipulations like (u32)(n) and (u32)((n) >> 32).
> They are good helpers in both little and big endian cases.
> Port these two functions here from Linux:include/linux/kernel.h,
> cater the comment message to little/big endian cases.
> Later on, developers could include linux/compat.h if they want to
> use these two functions.
> 
> Signed-off-by: Lijun Pan <Lijun.Pan at freescale.com>

Applied to u-boot/master, thanks!

-- 
Tom
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