java/openjdk24: set proper ABI on powerpc64

n file included from /wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/share/precompiled/precompiled.hpp:45:
In file included from /wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/share/nmt/memTracker.hpp:30:
In file included from /wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/share/nmt/memoryFileTracker.hpp:34:
In file included from /wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/share/runtime/os.inline.hpp:31:
/wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/os_cpu/bsd_ppc/os_bsd_ppc.inline.hpp:35:10: error: no member named 'resolve_function_descriptor' in 'os::Bsd'; did you mean simply 'resolve_function_descriptor'?

35 |   return os::Bsd::resolve_function_descriptor(p);
   |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   |          resolve_function_descriptor

/wrkdirs/usr/ports/java/openjdk24/work/openjdk-jdk-24.0.2-ga-freebsd-1/src/hotspot/os_cpu/bsd_ppc/os_bsd_ppc.inline.hpp:34:18: note: 'resolve_function_descriptor' declared here

34 | inline void* os::resolve_function_descriptor(void* p) {
   |                  ^

1 error generated.