Merge tag 'pull-riscv-to-apply-20220728' of github.com:alistair23/qemu into staging

Merge tag 'pull-riscv-to-apply-20220728' of github.com:alistair23/qemu into staging

Sixth RISC-V PR for QEMU 7.1

This is a PR to go in for RC1. It fixes a segfault that occurs
when using multiple sockets on the RISC-V virt board. It also
includes a small fix to allow both Zmmul and M extensions.

* Allow both Zmmul and M extension
* Fix multi-socket plic configuraiton

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* tag 'pull-riscv-to-apply-20220728' of github.com:alistair23/qemu:
  hw/intc: sifive_plic: Fix multi-socket plic configuraiton
  RISC-V: Allow both Zmmul and M

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>