biology/spoa: fix build on non-x86

In file included from /wrkdirs/usr/ports/biology/spoa/work/spoa-4.0.7/src/dispatcher.cpp:7:
/usr/local/include/cpuinfo_x86.h:228:2: error: "Including cpuinfo_x86.h from a non-x86 target."
#error "Including cpuinfo_x86.h from a non-x86 target."