[U-Boot] net/designware: add explicit reset of {tx|rx}_currdescnum

[Tom Rini]

On Mon, Jan 13, 2014 at 01:28:38PM +0400, Alexey Brodkin wrote:

> Driver "init" function might be called multiple times.
> On every "init" Tx/Rx buffer descriptors are initialized: "descs_init"
> -> "{tx|rx}_descs_init".
> 
> In its turn those init functions set MAC's "{tx|rx}desclistaddr" to
> point on the first buffer descriptor in the list.
> 
> So CPU to start operation from the first buffer descriptor as well after
> every "init" we have to reset "{tx|rx}_currdescnum".
> 
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> 
> Cc: Joe Hershberger <joe.hershberger at ni.com>
> Cc: Vipin Kumar <vipin.kumar at st.com>
> Cc: Stefan Roese <sr at denx.de>
> Cc: Mischa Jonker <mjonker at synopsys.com>

Applied to u-boot/master, thanks!

-- 
Tom
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