[coreboot-gerrit] Change in coreboot[master]: soc/mediatek/mt8192: Add SPI flash controller DMA read function

[CK HU (Code Review)]

CK HU has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/44851 )

Change subject: soc/mediatek/mt8192: Add SPI flash controller DMA read function
......................................................................

Patch Set 2:
> Patch Set 1:
>
> (1 comment)
>
> Changing from PIO+DMA (boot time: 879,067) to full-DMA (871,016) saved 8051us ~ 8ms. Please replace the PIO+DMA with my version (full DMA).

Done.