RFR: 8319412: RISC-V: Simple fix of indent in c2_MacroAssembler_riscv.hpp

[Hamlin Li]

Hi,
Can you review this simple patch fixing the inconsistent indent in c2_MacroAssembler_riscv.hpp?
Thanks!

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Commit messages:
 - Initial commit

Changes: https://git.openjdk.org/jdk/pull/16500/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16500&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319412
  Stats: 37 lines in 1 file changed: 0 ins; 0 del; 37 mod
  Patch: https://git.openjdk.org/jdk/pull/16500.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16500/head:pull/16500

PR: https://git.openjdk.org/jdk/pull/16500