Merge remote-tracking branch 'remotes/philmd/tags/sdmmc-20210322' into staging

Merge remote-tracking branch 'remotes/philmd/tags/sdmmc-20210322' into staging

SD/MMC patches queue

- Fix build error when DEBUG_SD is on
- Perform SD ERASE operation
- SDHCI ADMA heap buffer overflow
  (CVE-2020-17380, CVE-2020-25085, CVE-2021-3409)

# gpg: Signature made Mon 22 Mar 2021 17:13:43 GMT
# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* remotes/philmd/tags/sdmmc-20210322:
  hw/sd: sdhci: Reset the data pointer of s->fifo_buffer[] when a different block size is programmed
  hw/sd: sdhci: Limit block size only when SDHC_BLKSIZE register is writable
  hw/sd: sdhci: Correctly set the controller status for ADMA
  hw/sd: sdhci: Don't write to SDHC_SYSAD register when transfer is in progress
  hw/sd: sdhci: Don't transfer any data when command time out
  hw/sd: sd: Actually perform the erase operation
  hw/sd: sd: Fix build error when DEBUG_SD is on

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>