[aarch64] Remove mmla kernel support from apple (microsoft#18082)

### Description
<!-- Describe your changes. -->
The mmla kernels require additional ISA flags
and are currently supported only on Linux


### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
more context is in microsoft#15270

cc: @skottmckay , @chenfucn , @snnn

cmake/onnxruntime_mlas.cmake

@@ -325,9 +325,7 @@ else()
           ${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelNeon.S
           ${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelNeon.S
           ${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelUdot.S
-          ${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelUmmla.S
           ${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSdot.S
-          ${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSmmla.S
           ${MLAS_SRC_DIR}/aarch64/SgemmKernelNeon.S
           ${MLAS_SRC_DIR}/aarch64/SgemvKernelNeon.S
           ${MLAS_SRC_DIR}/aarch64/SymQgemmS8KernelNeon.S
@@ -336,24 +334,26 @@ else()
           ${MLAS_SRC_DIR}/qgemm_kernel_neon.cpp
           ${MLAS_SRC_DIR}/qgemm_kernel_udot.cpp
           ${MLAS_SRC_DIR}/qgemm_kernel_sdot.cpp
-          ${MLAS_SRC_DIR}/qgemm_kernel_ummla.cpp
-          ${MLAS_SRC_DIR}/qgemm_kernel_smmla.cpp
         )
         if (NOT APPLE)
           set(mlas_platform_srcs
             ${mlas_platform_srcs}
             ${MLAS_SRC_DIR}/aarch64/HalfGemmKernelNeon.S
+            ${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSmmla.S
+            ${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelUmmla.S
             ${MLAS_SRC_DIR}/activate_fp16.cpp
             ${MLAS_SRC_DIR}/dwconv.cpp
             ${MLAS_SRC_DIR}/halfgemm_kernel_neon.cpp
             ${MLAS_SRC_DIR}/pooling_fp16.cpp
+            ${MLAS_SRC_DIR}/qgemm_kernel_smmla.cpp
+            ${MLAS_SRC_DIR}/qgemm_kernel_ummla.cpp
           )
           set_source_files_properties(${MLAS_SRC_DIR}/aarch64/HalfGemmKernelNeon.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
+          set_source_files_properties(${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSmmla.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+i8mm ")
+          set_source_files_properties(${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelUmmla.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+i8mm ")
           set_source_files_properties(${MLAS_SRC_DIR}/activate_fp16.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
           set_source_files_properties(${MLAS_SRC_DIR}/dwconv.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
           set_source_files_properties(${MLAS_SRC_DIR}/pooling_fp16.cpp PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+fp16 ")
-          set_source_files_properties(${MLAS_SRC_DIR}/aarch64/QgemmU8X8KernelUmmla.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+i8mm ")
-          set_source_files_properties(${MLAS_SRC_DIR}/aarch64/QgemmS8S8KernelSmmla.S PROPERTIES COMPILE_FLAGS " -march=armv8.2-a+i8mm ")
         endif()
 
         if(ONNXRUNTIME_MLAS_MULTI_ARCH)