[riscv-port-jdk17u:riscv-port] RFR: 8299168: RISC-V: Fix MachNode size mismatch for MacroAssembler::_verify_oops*

[Xiaolin Zheng]

Backport `8299168: RISC-V: Fix MachNode size mismatch for MacroAssembler::_verify_oops*`.

Tested along with remaining patches, hotspot tier1~4 with fastdebug build.

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Commit messages:
 - 8299168: RISC-V: Fix MachNode size mismatch for MacroAssembler::_verify_oops*

Changes: https://git.openjdk.org/riscv-port-jdk17u/pull/32/files
 Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk17u&pr=32&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299168
  Stats: 14 lines in 1 file changed: 6 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/riscv-port-jdk17u/pull/32.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk17u.git pull/32/head:pull/32

PR: https://git.openjdk.org/riscv-port-jdk17u/pull/32