This fixes my acer aspire A114-32-P7E5, which has eMMC flash memory that
requires this patch to work. It showed CMD13 failing with result 2 (bad crc),
preventing bsdinstall from continuing. This is with a gemini lake sdhci.
successful dmesg: https://dmesgd.nycbug.org/index.cgi?do=view&id=5472
From reading around online, it seems that some number of cards can not depend on
CMD13 to check for errors while switching to HS200. They generate BADCRC errors
for a short bit before CMD13 succeeds. It's my understanding that CMD13 is used after
CMD6 to verify switching has completed, and if these BADCRC errors are observed
we should ignore them and retry CMD13.
I've update mmc_switch_status to have an argument to ignore bad crc errors,
which the caller sets if we are switching to HS200. This seemed to be the best
place to do this.