Update sdmmc support

[richardeoin]

Update sdio-host version and improve eMMC support

[richardeoin]

@ostenning There's a few changes to the sdmmc support here, it would be helpful if you could try this out!

[ost-ing]

Hi @richardeoin , I've given this branch a fairly quick test with the embedded-sdmmc-rs crate, reading / writing data to the FAT32 formatted SDCard. I've had no problems as of yet.

Is there anything specifically you would like me to test?

[richardeoin]

Thanks @ostenning 👍 I was looking for a sanity check really, so that test with embedded-sdmmc-rs is great

[burrbull]

@richardeoin Do you plan to update f4xx-hal also?

[richardeoin]

@burrbull No I don't plan to update f4xx-hal. The F4 reference manuals I found don't mention eMMC at all (although it might still be possible..) and I don't have any f4 + eMMC hardware to test on

[richardeoin]

bors r+

[bors[bot]]

This PR was included in a batch that was canceled, it will be automatically retried

[bors[bot]]

Build succeeded:

• ci (1.59.0, stm32h735)
• ci (1.59.0, stm32h743)
• ci (1.59.0, stm32h743v)
• ci (1.59.0, stm32h747cm7)
• ci (1.59.0, stm32h753)
• ci (1.59.0, stm32h753v)
• ci (1.59.0, stm32h7b0)
• ci (1.59.0, stm32h7b3)
• ci (stable, stm32h735)
• ci (stable, stm32h743)
• ci (stable, stm32h743v)
• ci (stable, stm32h747cm7)
• ci (stable, stm32h753)
• ci (stable, stm32h753v)
• ci (stable, stm32h7b0)
• ci (stable, stm32h7b3)
• Rustfmt