comms/hydrasdr: fix build on powerpc64*

n file included from /wrkdirs/usr/ports/comms/hydrasdr/work/rfone_host-1.0.2/libhydrasdr/src/iqconverter_float.c:45:
In file included from /usr/lib/clang/19/include/ppc_wrappers/immintrin.h:15:
/usr/lib/clang/19/include/ppc_wrappers/mmintrin.h:31:2: error: "Please read comment above. Use -DNO_WARN_X86_INTRINSICS to disable this error."

31 | #error                                                                         \
   |  ^