8248130: AArch64: pf() uses mtNone instead of mtInternal

[Kim Barrett]

> On Jun 23, 2020, at 3:14 AM, Stefan Karlsson <stefan.karlsson at oracle.com> wrote:
> 
> Hi all,
> 
> Please review this trivial patch to change the NMT flag used by one of the debugging functions on AArch64.
> 
> https://cr.openjdk.java.net/~stefank/8248130/webrev.01/
> https://bugs.openjdk.java.net/browse/JDK-8248130
> 
> If pf() is used when NMT is turned on we hit this assert:
> MallocSite* MallocSiteTable::lookup_or_add(const NativeCallStack& key, size_t* bucket_idx,
>  size_t* pos_idx, MEMFLAGS flags) {
>  assert(flags != mtNone, "Should have a real memory type");
> 
> The patch simply changes the used flag to mtInternal.
> 
> Thanks,
> StefanK

Good, and trivial.  Thanks for cleaning this up.