[PATCH] imx: Suggest the NXP ATF github repo

[Oliver Graute]

> Am 13.01.2023 um 01:52 schrieb Fabio Estevam <festevam at denx.de>:
> 
> As explained in the text at the bottom of the page 
> https://source.codeaurora.org/external/imx/imx-atf:
> 
> "QUIC repositories on this site will not receive any updates after
> March 31, 2022, and will be deleted on March 31, 2023."
> 
> Point to the NXP ATF github repo instead.
> 
> Signed-off-by: Fabio Estevam <festevam at denx.de>

Reviewed-by: Oliver Graute <oliver.graute at kococonnector.com>