[packages/xorg-driver-video-nvidia] - drop ifarch mess and just make the package exclusevarch to x8664

[Jan Palus]

On 06.05.2018 12:56, baggins wrote:
> commit 2ea8529d8aa59a06136fff1888587dbb2c6ff24c
> Author: Jan Rękorajski <baggins at pld-linux.org>
> Date:   Sun May 6 12:55:39 2018 +0200
> 
>     - drop ifarch mess and just make the package exclusevarch to x8664

The point of "ifarch mess" was to still be able to run 32bit apps (like most of
the games) on 64bit systems.