misc/py-onnxruntime: fix build on powerpc64le
/wrkdirs/usr/ports/misc/py-onnxruntime/work-py312/build/Release/_deps/eigen3-src/unsupported/Eigen/CXX11/../../../Eigen/src/Core/arch/AltiVec/PacketMath.h:119:35: error: 'vec_lvsl' is deprecated: use assignment for unaligned little endian loads/stores [-Werror,-Wdeprecated-declarations]