lc0: enable sse intrinsics on ppc64le + disable on big endian

This code is written heavily against x86 with a bunch of ifdefs
for ARM/aarch64 to make that build. Therefore, restrict archs
and instead of patching the code for ppc64le, allow usage of
the SSE intrinsics.

srcpkgs/lc0/template

@@ -2,6 +2,7 @@
 pkgname=lc0
 version=0.28.0
 revision=1
+archs="x86_64* i686* aarch64* armv[67]l* ppc64le*"
 build_style=meson
 configure_args="-Dgtest=false"
 _lczero_commit=5680c5fad9f3b52288d67f738b272fd09de5ee0b
@@ -29,6 +30,10 @@ if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then
 	makedepends+=" libatomic-devel"
 fi
 
+case "$XBPS_TARGET_MACHINE" in
+	ppc*) export CXXFLAGS+=" -DNO_WARN_X86_INTRINSICS";;
+esac
+
 post_extract() {
 	rmdir libs/lczero-common
 	mv ../lczero-common-${_lczero_commit} libs/lczero-common