always build sgemm_direct kernel on arm64, even if just as dummy

kernel/CMakeLists.txt

@@ -208,7 +208,7 @@ function (build_core TARGET_CORE KDIR TSUFFIX KERNEL_DEFINITIONS)
       set(USE_TRMM true)
     endif ()
     set(USE_DIRECT_SGEMM false)
-    if (X86_64 OR (ARM64 AND (UC_TARGET_CORE MATCHES ARMV9SME)))
+    if (X86_64 OR ARM64)
        set(USE_DIRECT_SGEMM true)
     endif()
 
@@ -225,9 +225,11 @@ function (build_core TARGET_CORE KDIR TSUFFIX KERNEL_DEFINITIONS)
 	  set (SGEMMDIRECTSMEKERNEL sgemm_direct_sme1.S)
 	  set (SGEMMDIRECTPREKERNEL sgemm_direct_sme1_preprocess.S)
 	  GenerateNamedObjects("${KERNELDIR}/${SGEMMDIRECTKERNEL}" "" "gemm_direct" false "" "" false SINGLE)
+   	  if (HAVE_SME)
 	  GenerateNamedObjects("${KERNELDIR}/${SGEMMDIRECTSMEKERNEL}" "" "gemm_direct_sme1" false "" "" false SINGLE)
 	  GenerateNamedObjects("${KERNELDIR}/${SGEMMDIRECTPREKERNEL}" "" "gemm_direct_sme1_preprocess" false "" "" false SINGLE)
 	  endif ()
+   	  endif ()
     endif()
 
     foreach (float_type SINGLE DOUBLE)