[U-Boot] [PATCH 2/2] mmc: Skip changing bus width for MMC cards earlier than version 4.0

[Alexey Brodkin]

Hi Pantelis,

On Thu, 2014-12-25 at 10:22 -0600, Andrew Gabbasov wrote:
> Wider bus widths (larger than default 1 bit) appeared in MMC standard
> version 4.0. So, for MMC cards of any earlier version trying to change
> the bus width (including ext_csd comparison) does not make any sense.
> It may work incorrectly and at least cause unnecessary timeouts.
> So, just skip the entire bus width related activity for earlier versions.
> 
> Signed-off-by: Andrew Gabbasov <andrew_gabbasov at mentor.com>
> Tested-by: Alexey Brodkin <abrodkin at synopsys.com>

This change fixes regression introduced in
https://patchwork.ozlabs.org/patch/416442/ for MMC cards.

Please consider applying if you don't have any objections.

Regards,
Alexey