Merge remote-tracking branch 'remotes/rth/tags/pull-or1k-20190904' into staging

Updates for arch v1.3.

# gpg: Signature made Wed 04 Sep 2019 21:30:41 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Richard Henderson <[email protected]>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-or1k-20190904:
  target/openrisc: Update cpu "any" to v1.3
  target/openrisc: Implement l.adrp
  target/openrisc: Implement move to/from FPCSR
  target/openrisc: Implement unordered fp comparisons
  target/openrisc: Add support for ORFPX64A32
  target/openrisc: Check CPUCFG_OF32S for float insns
  target/openrisc: Fix lf.ftoi.s
  target/openrisc: Add VR2 and AVR special processor registers
  target/openrisc: Move VR, UPR, DMMCFGR, IMMCFGR to cpu init
  target/openrisc: Make VR and PPC read-only
  target/openrisc: Cache R0 in DisasContext
  target/openrisc: Replace cpu register array with a function
  target/openrisc: Add DisasContext parameter to check_r0_write

Signed-off-by: Peter Maydell <[email protected]>