[PATCH RESEND] net: pxa168_eth: avoid using signed char for bitops

[David Miller]

From: Antoine Tenart <antoine.tenart at free-electrons.com>
Date: Fri,  3 Oct 2014 17:08:19 +0200

> Signedness bugs may occur when using signed char for bitops,
> depending on if the highest bit is ever used.
> 
> Signed-off-by: Antoine Tenart <antoine.tenart at free-electrons.com>
> Reported-by: Dan Carpenter <dan.carpenter at oracle.com>

Applied, thanks.