RFR(XXS):8244170: correct instruction typo for dcps1/2/3

[Liu, Xin]

Hi,

Please review the typo correction change for aarch64.
The change is trivial. It just makes the instruction name dcps same as armv8 manual.

JBS: https://cr.openjdk.java.net/~xliu/8244170/webrev/
webrev: https://bugs.openjdk.java.net/browse/JDK-8244170

I ran hotspot-tier1 and no regression found for fastdebug build on aarch64.

Thanks,
--lx