fix(PortduinoGlue): spi_dev_int packing

[StaticRocket]

Operator precedence dictates that the addition will occur before the left shift unless we persuade the compiler to do otherwise.

Fixes: 45c1b46 ("Move native to spi_host to indicate spidev for LovyanGFX")

See the following unpacking logic for more information:
https://github.com/meshtastic/framework-portduino/blob/master/cores/portduino/linux/LinuxHardwareSPI.cpp#L84-L91

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ thebentern
❌ StaticRocket
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[github-actions]

@StaticRocket, Welcome to Meshtastic!

Thanks for opening your first pull request. We really appreciate it.

We discuss work as a team in discord, please join us in the #firmware channel.
There's a big backlog of patches at the moment. If you have time,
please help us with some code review and testing of other PRs!

Welcome to the team 😄

[jp-bennett]

Looks like this addresses #9315
Edit: on second look, appears to be a different issue

[StaticRocket]

Not quite. It's a different bug I noticed while playing with that one.

[StaticRocket]

Please hold on merging this if that CLA is still in effect. TI owns my commits both in and outside of the office so I need them to agree to it.