refactor: SD card SPI HAL

[raphaelcoeffic]

Summary of changes:

• Moved SPI SD card to HAL/LL (ported from RIOT-OS)
• New generic diskio API (similar to ST's middleware)

[richardclli]

@raphaelcoeffic I think you may need to consider this PR as well. Change in SD card specific functions may breaks Virtual FS.

#3962

[raphaelcoeffic]

I think you may need to consider #3962. Change in SD card specific functions may breaks Virtual FS.

Probably, yes. I will need to rebase / port on top of this PR as soon as I have tested and fixed it. The plan we had with @gagarinlg was to adopt a more generic FatFs driver as the first layer similar to this: https://github.com/STMicroelectronics/stm32_mw_fatfs/blob/master/src/ff_gen_drv.h

[3djc]

Did run some test in T20 (because of the SD chip instead of card)

• no issue found at all
• write speed is about 10/15% faster than main
• read speed is much faster than main
• tested both while in bootloader or while running firmware, with similar results

[3djc]

Also tested on X7 (for the F2 processor, SD is a no name 32Gb class 10 card)

no issue found at all
write speed is about 10/15% faster than main
read speed is faster than main (but not as good as T20)
tested both while in bootloader or while running firmware, with similar results

[3djc]

Tested now on X7 with 256MB card supplied with another radio:

• full of errors
• impossible to format card from PC when in BL mode (not tried in firmware)

SAME card directly connected to PC with a SDCard adapter:

• no errors
• formatting is fine

Errors are mysteriously gone in radio after the sd card reformat, something strange is at play since something similar happened to Raph

[3djc]

Test on X7 (F2) : all ok, despite using the dreadful no name sd (tested mass storage and BL mode)
Test on TX12MKII (F4) : all ok, despite using the dreadful no name sd (tested mass storage and BL mode)
Test on T20 (F4, internal SD chip) : all ok (and faster !)
Test on TX16S (should not be affected, but just checking anyway) : FAIL. Card cannot read on this branch (both main and 2.9.0 work fine on exact same hardware setup)

[3djc]

Ok now :)

[pfeerick]

X9D+2019: Flashed FW and BL, twice. Navigating SD, renaming, deleting fine. Models and radio settings intact. Able to copy files and make changes via USB when radio in BL or running main firmware. Able to update ISRM via SD. Able to run standalone lua from SD.

BetaFPV LR3: Same as above (except for ISRM update obviously).

EL18: DFU flashed firmware as one trim hat borked with repeated bootloader flashes 🤭, otherwise everything seems to be working as above.

[philmoz]

This PR breaks audio playback on my EL18 - no sounds can be played from the SOUNDS folder.

No startup sound played, no sounds played by scripts or special functions and sound does not play if manually selected from the file browser.

TX16 is not affected, only broken on EL18.