multimedia/x265: unbreak on non-x86 archs after r474814

common/param.cpp:636:24: error: no matching function for call to 'parseCpuName'

p->cpuid = parseCpuName(value, bError);
           ^~~~~~~~~~~~

common/param.h:36:7: note: candidate function not viable: requires 3 arguments, but 2 were provided
int parseCpuName(const char *value, bool& bError, bool bEnableavx512);

^

Approved by: portmgr blanket (unblock ffmpeg consumers)