Merge remote-tracking branch 'remotes/palmer/tags/riscv-for-master-4.2-rc3' into staging

RISC-V Patches for 4.2-rc3

This tag contains two patches that I'd like to target for 4.2-rc3:

* A fix to the DT entry for the SiFive test finisher.
* A fix to the spike board's HTIF interface.

This passes "make check" and boots OE for me.

# gpg: Signature made Mon 25 Nov 2019 20:51:13 GMT
# gpg:                using RSA key 00CE76D1834960DFCE886DF8EF4CA1502CCBAB41
# gpg:                issuer "palmer@dabbelt.com"
# gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>" [unknown]
# gpg:                 aka "Palmer Dabbelt <palmer@sifive.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 00CE 76D1 8349 60DF CE88  6DF8 EF4C A150 2CCB AB41

* remotes/palmer/tags/riscv-for-master-4.2-rc3:
  hw/riscv: Add optional symbol callback ptr to riscv_load_kernel()
  RISC-V: virt: This is a "sifive,test1" test finisher

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