soc: mediatek: SVS: fix device reference leak in svs_add_device_link()

[Markus Elfring]

…
> PCS is where most of my remaining TODO list is, so that's where I'll
> spend the next chunk of time. If I get through that and still have room,
> I'll take a look at the other () call sites that have the
> same missing-put_device pattern. There seem to be a few.…

Would you be looking for further software improvements?
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/scripts/coccinelle/free/put_device.cocci?h=next-20261023#n2
https://elixir.bootlin.com/linux/v7.3/A/ident/device_link_add

Regards,
Markus