Fix H7EXTREME

[haslinghuis]

• Fixes configuration as power cycling was putting the board in DFU mode.
• SDCard for Blackbox is not recognized. Using SPI flash instead.
• Added timer map and dma options

[blckmn]

AUTOMERGE: (FAIL)

• github identifies PR as mergeable -> FAIL
• assigned to a milestone -> PASS
• cooling off period lapsed -> PASS
• commit count less or equal to three -> PASS
• Don't merge label NOT found -> PASS
• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL

[hydra]

• Fixes configuration as power cycling was putting the board in DFU mode.

this is caused by a mismatch between where the bootloader expects the config and firmware to be saved and where BF was actually saving the config - it was overwriting the firmware partition with the config. the BL will boot from RAM when any previously-loaded firmware is present there. After a power cycle the BL would try loading from flash again, but the firmware will have been corrupted by BF overwriting it with config. the MD5 hash and hashing technique employed by the bootloader worked perfectly and put the FC in DFU mode ready to be flashed with fixed firmware.

* [x]  SDCard for Blackbox is not recognized. Using SPI flash instead.

It's not clear what this PR does. Does SDCard for BB logging now work or does this PR disable SDCard for BB logging? If the latter why?

[haslinghuis]

@hydra Yes please have a look.

With 4.3.1 SDCard is available in blackbox logger tab as default.
With 4.5.0 SDCard option is absent.

[github-actions]

Do you want to test this code? Here you have an automated build:
Assets
WARNING: It may be unstable. Use only for testing! See: https://www.youtube.com/watch?v=I1uN9CN30gw for instructions for unified targets!