hg: jdk/sandbox: 8204331: AArch64: fix CAS not embedded in normal graph error

[chris.hegarty at oracle.com]

Changeset: 9894c4d30168
Author:    adinn
Date:      2018-06-22 11:21 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/9894c4d30168

8204331: AArch64: fix CAS not embedded in normal graph error
Summary: JDK fails with assert on AArch64 after changes made by JDK-8202377
Reviewed-by: roland, rkennke

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