spi_flash: Fix definition for btt-skr-mini-e3-v3

[nhchiu]

The original config gets an error: "SPIFlashError: Failed to Initialize SD Card." when flashing skr-mini-e3-v3 through UART. Same result with several sd cards with different brands and capacity.

Changing spi_bus to swspi made it work.

Signed-off-by: Nathan Chiu [email protected]

[KevinOConnor]

Okay, but it will be necessary to find the root cause of the error. Making changes without understanding the root cause increases the risk of introducing a regression for other users.

-Kevin

[nhchiu]

Sorry. I've checked the STM32g0b1 pin schematic and the spi1 bus is using the same pins as the SWSPI pins I assigned. But my knowledge about MCU is too limited so I couldn't figure out why using SWSPI instead makes it work. I opened the PR wishing someone could take a look at it... Thanks.

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