[Skiboot] [RFC 2/2] pci/quirk: Populate device tree for AST2400 VGA

[Benjamin Herrenschmidt]

On Tue, 2016-12-20 at 17:53 +1100, Russell Currey wrote:
> +       /* ast_ahb_writel(0x79, 0x1E6E2180); */

When we finally do that we should make it a read-modify-write cycle to
only clear (or set) the specific bits we care about.

Cheers,
Ben.