Fix I8080.set_byte_order()

[Dominaezzz]

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Pull Request Details 📖

Description

Fixes #2362 by splitting the set_byte_order into two functions.
The user is now responsible for calling the right one depending on the bus width, which will be straight forward for most users.
Those that share the bus between 8-bit and 16-bit devices will have to do a little more work.

Testing

Works as expected on my Slint app.

@yanshay pls confirm this PR works for you too.

[bugadani]

We either should use a separate BitOrder enum, or call the thing Endianness (And it's variants MsbFirst and LsbFirst because what even is the default bit/byte order?).

I guess we'll do this separately, along with providing a Config struct if we ever figure those parts out.