Change in coreboot[master]: soc/amd/common/block/lpc/spi_dma: Add ability to verify SPI DMA hardware

[Raul Rangel (Code Review)]

Attention is currently required from: Jason Glenesk, Marshall Dawson, Rob Barnes, Karthik Ramasubramanian, Felix Held.
Raul Rangel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56322 )

Change subject: soc/amd/common/block/lpc/spi_dma: Add ability to verify SPI DMA hardware
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Patch Set 6:

(1 comment)

File src/soc/amd/common/block/lpc/spi_dma.c:

https://review.coreboot.org/c/coreboot/+/56322/comment/95a58d6b_16742d88 
PS6, Line 147:  + 1
> Will this be confusing to the (console) reader?

I either need to `current_block + 1` or `total_blocks - 1`, I figured block 0/100 read like we haven't read any block.