[PATCH] soc: apple: rtkit: Fix buffer address field width

[Sven Peter]

> On 24. Feb 2023, at 07:50, Asahi Lina <lina at asahilina.net> wrote:
> 
> The buffer address field is missing two bits. This matters for the GPU,
> which uses upper-half 64-bit addresses on the ASC and those get sign
> extended from the mailbox message field, so the right number of high
> bits need to be set.
> 
> Signed-off-by: Asahi Lina <lina at asahilina.net>
> --

Reviewed-by: Sven Peter <sven at svenpeter.dev>