Merge remote-tracking branch 'remotes/palmer/tags/riscv-for-master-4.0-sf1' into staging

RISC-V Patches for the 4.0 Soft Freeze, Part 1

This patch set contains a handful of patches I've collected over the
last few weeks.  There's nothing really fundamental, but I thought it
would be good to send these out now as there are some other patch sets
on the mailing list that are getting ready to go.

As far as the actual patches, there's:

* A set that cleans up our FS dirty-mode handling.
* Support for writing MISA.
* The removal of Michael as a maintainer.
* A fix to {m,s}counteren handling.
* A fix to make sure the kernel's start address is computed correctly on
  32-bit targets.

This makes my "RISC-V Patches for 3.2, Part 3" pull request defunct, as
it contains the same patches but based on a newer master.  As usual,
I've tested this using a Fedora boot on the latest Linux.  This patch
set does not include Bastian's decodetree patches because there were
some merge conflicts and while I've cleaned them up I want to get a
round of review first.

# gpg: Signature made Wed 13 Feb 2019 15:37:50 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-4.0-sf1:
  riscv: Ensure the kernel start address is correctly cast
  target/riscv: fix counter-enable checks in ctr()
  MAINTAINERS: Remove Michael Clark as a RISC-V Maintainer
  RISC-V: Add misa runtime write support
  RISC-V: Add misa.MAFD checks to translate
  RISC-V: Add misa to DisasContext
  RISC-V: Add priv_ver to DisasContext
  RISC-V: Use riscv prefix consistently on cpu helpers
  RISC-V: Implement mstatus.TSR/TW/TVM
  RISC-V: Mark mstatus.fs dirty
  RISC-V: Split out mstatus_fs from tb_flags

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