Add into_parts for QSpi

[tgross35]

Summary

Add into_parts for Qspi to retreive pins

Checklist

• CHANGELOG.md for the BSP or HAL updated
• All new or modified code is well documented, especially public items
• No new warnings or clippy suggestions have been introduced (see CI or check locally)

If Adding a new Board

• Board CI added to crates.json
• Board is properly following "Tier 2" conventions, unless otherwise decided to be "Tier 1"

If Adding a new cargo feature to the HAL

• Feature is added to the test matrix for applicable boards / PACs in crates.json

I was short on time and just needed a quick fix for my use case, but I figured I might as well open this PR to open discussion.

Is there any specific reason these methods to return the consumed pins/peripherals aren't available? Or is this a discussion that needs to happen at embedded-hal?. I've seen both into_inner and into_parts for naming, not sure which is more standard.

The quick fix I did here was for Qspi only, but the same goes for Spi, I2C, Uart, etc.

[jbeaurivage]

@tgross35, I'm not sure every peripheral module adheres to this, but many of them call that type of function free.

[jbeaurivage]

@tgross35 If you want to fix the formatting and rebase to master, I'll be happy to merge!

[tgross35]

Thanks @jbeaurivage, I totally forgot about this.

Changed the name to free and fixed the formatting issue. I don't know whether this is changelog-worthy or not, but let me know if so and I can add an entry.