[U-Boot] lib/crc8: Add crc start value

[Tom Rini]

On Fri, Apr 08, 2016 at 03:56:29PM +0200, Stefan Roese wrote:

> To make the usage of this function more flexible, lets add the CRC start
> value as parameter to this function. This way it can be used by other
> functions requiring different start values than 0 as well.
> 
> For non-zero CRC start values to work, I've reworked the function a bit.
> The new implementation is copied from the Linux version in
> drivers/i2c/i2c-core.c / i2c_smbus_pec(). Which supports non-zero
> CRC stating values.
> 
> I've double-checked that the results for zero starting values are
> identical to the results from the original version of this function.
> 
> Signed-off-by: Stefan Roese <sr at denx.de>
> Cc: Simon Glass <sjg at chromium.org>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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