DO NOT MERGE; Revert "loongarch float16: use a portable version to av…

…oid compilation errors"

For testing purpose only; to confirm that the new CI job catches the
issue

This reverts commit 891ad5b.

simde/simde-f16.h

@@ -72,7 +72,6 @@ SIMDE_BEGIN_DECLS_
     !(defined(HEDLEY_MSVC_VERSION) && defined(__clang__)) && \
     !(defined(SIMDE_ARCH_MIPS) && defined(__clang__)) && \
     !(defined(SIMDE_ARCH_ZARCH) && defined(__clang__)) && \
-    !(defined(SIMDE_ARCH_LOONGARCH) && defined(__clang__)) && \
     !(defined(__clang__) && defined(SIMDE_ARCH_RISCV64)) && ( \
       defined(SIMDE_X86_AVX512FP16_NATIVE) || \
       (defined(SIMDE_ARCH_X86_SSE2) && HEDLEY_GCC_VERSION_CHECK(12,0,0)) || \