Merge remote-tracking branch 'remotes/mcayland/tags/qemu-sparc-20210307' into staging

qemu-sparc queue

# gpg: Signature made Sun 07 Mar 2021 12:07:13 GMT
# gpg:                using RSA key CC621AB98E82200D915CC9C45BC2C56FAE0F321F
# gpg:                issuer "mark.cave-ayland@ilande.co.uk"
# gpg: Good signature from "Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>" [full]
# Primary key fingerprint: CC62 1AB9 8E82 200D 915C  C9C4 5BC2 C56F AE0F 321F

* remotes/mcayland/tags/qemu-sparc-20210307: (42 commits)
  esp: add support for unaligned accesses
  esp: implement non-DMA transfers in PDMA mode
  esp: add trivial implementation of the ESP_RFLAGS register
  esp: convert cmdbuf from array to Fifo8
  esp: convert ti_buf from array to Fifo8
  esp: transition to message out phase after SATN and stop command
  esp: add maxlen parameter to get_cmd()
  esp: raise interrupt after every non-DMA byte transferred to the FIFO
  esp: remove old deferred command completion mechanism
  esp: defer command completion interrupt on incoming data transfers
  esp: latch individual bits in ESP_RINTR register
  esp: implement FIFO flush command
  esp: add 4 byte PDMA read and write transfers
  esp: remove pdma_origin from ESPState
  esp: use FIFO for PDMA transfers between initiator and device
  esp: fix PDMA target selection
  esp: rename get_cmd_cb() to esp_select()
  esp: remove CMD pdma_origin
  esp: use in-built TC to determine PDMA transfer length
  esp: use ti_wptr/ti_rptr to manage the current FIFO position for PDMA
  ...

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