Merge remote-tracking branch 'remotes/philmd/tags/mips-20211018' into staging

MIPS patches queue

Hardware emulation:
- Generate FDT blob for Boston machine (Jiaxun)
- VIA chipset cleanups (Zoltan)

TCG:
- Use tcg_constant() in Compact branch and MSA opcodes
- Restrict nanoMIPS DSP MULT[U] opcode accumulator to Rel6
- Fix DEXTRV_S.H DSP opcode
- Remove unused TCG temporary for some DSP opcodes

# gpg: Signature made Sun 17 Oct 2021 03:50:57 PM PDT
# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]

* remotes/philmd/tags/mips-20211018:
  via-ide: Avoid using isa_get_irq()
  vt82c686: Add a method to VIA_ISA to raise ISA interrupts
  vt82c686: Move common code to via_isa_realize
  via-ide: Set user_creatable to false
  target/mips: Remove unused TCG temporary in gen_mipsdsp_accinsn()
  target/mips: Fix DEXTRV_S.H DSP opcode
  target/mips: Use tcg_constant_tl() in gen_compute_compact_branch()
  target/mips: Use explicit extract32() calls in gen_msa_i5()
  target/mips: Use tcg_constant_i32() in gen_msa_3rf()
  target/mips: Use tcg_constant_i32() in gen_msa_2r()
  target/mips: Use tcg_constant_i32() in gen_msa_2rf()
  target/mips: Use tcg_constant_i32() in gen_msa_elm_df()
  target/mips: Remove unused register from MSA 2R/2RF instruction format
  hw/mips/boston: Add FDT generator
  hw/mips/boston: Allow loading elf kernel and dtb
  hw/mips/boston: Massage memory map information
  target/mips: Check nanoMIPS DSP MULT[U] accumulator with Release 6

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