git: openjdk/jdk: 8306667: RISC-V: Fix storeImmN0 matching rule by using zr register

[Fei Yang]

Changeset: e32de7ef
Author:    Xiaolin Zheng <xlinzheng at openjdk.org>
Committer: Fei Yang <fyang at openjdk.org>
Date:      2023-05-12 07:10:53 +0000
URL:       https://git.openjdk.org/jdk/commit/e32de7efd6f3173a0bba5829e8de3edd01cfdbab

8306667: RISC-V: Fix storeImmN0 matching rule by using zr register

Reviewed-by: shade, gli, fyang

! src/hotspot/cpu/riscv/riscv.ad