RFR: C2: Fix indentation and trailing whitespaces in x86_64.ad

[Stefan Karlsson]

Looks good.

StefanK

On 2018-03-14 09:19, Per Liden wrote:
> Cleaning out trailing whitespaces and adjusting indentation of load 
> barrier related stuff in x86_64.ad.
> 
> http://cr.openjdk.java.net/~pliden/zgc/ad_cleanup/webrev.0/
> 
> /Per