hg: panama/dev: AArch64: Fix jtreg failures about vector shift

[yang.zhang at arm.com]

Changeset: 91b861e03c08
Author:    yzhang
Date:      2020-04-02 11:34 +0800
URL:       https://hg.openjdk.java.net/panama/dev/rev/91b861e03c08

AArch64: Fix jtreg failures about vector shift
Summary: Fix build and jtreg test failures introduced by code merge.

! src/hotspot/cpu/aarch64/aarch64.ad