git: openjdk/mobile: 8241475: AArch64: Add missing support for PopCountVI node

[duke]

Changeset: a21c4fb0
Author:    Pengfei Li <pli at openjdk.org>
Date:      2020-04-03 17:06:14 +0000
URL:       https://git.openjdk.java.net/mobile/commit/a21c4fb0

8241475: AArch64: Add missing support for PopCountVI node

Reviewed-by: aph, njian

! src/hotspot/cpu/aarch64/aarch64.ad
! src/hotspot/cpu/aarch64/assembler_aarch64.hpp