hg: jdk/jdk12: 8215888: Register to register spill may use AVX 512 move instruction on unsupported platform.

[vivek.r.deshpande at intel.com]

Changeset: 3ab3cb8a8d41
Author:    sviswanathan
Date:      2019-01-03 14:55 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/3ab3cb8a8d41

8215888: Register to register spill may use AVX 512 move instruction on unsupported platform.
Reviewed-by: vlivanov, thartmann

! src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
! src/hotspot/cpu/x86/x86.ad