Update CPU kernel implementations and guard directives

Resolves COMPMID-6023

Change-Id: I868975d14c4f98af6716726feda22405a6a4c891
Signed-off-by: Michael Tyler <michael.tyler@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9686
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/arm_gemm/indirect-interleaves/sme_interleave2VL_bf16_bf16.hpp b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/sme_interleave2VL_bf16_bf16.hpp
index 14ee5d6..dc6d12b 100644
--- a/src/core/NEON/kernels/arm_gemm/indirect-interleaves/sme_interleave2VL_bf16_bf16.hpp
+++ b/src/core/NEON/kernels/arm_gemm/indirect-interleaves/sme_interleave2VL_bf16_bf16.hpp
@@ -22,16 +22,14 @@
  * SOFTWARE.
  */
 
-#if defined(__ARM_FEATURE_SVE)
+#if defined(ARM_COMPUTE_ENABLE_SME)
 
 template <>
 void interleave_block<2, 1, VLType::SME, false>(
   bfloat16 * &out, const bfloat16 * const *in,
-  size_t width, size_t height, size_t row_offset, bool first
+  size_t width, size_t height, size_t row_offset, bool
 )
 {
-  ARM_COMPUTE_UNUSED(first);
-
   __asm__ __volatile__(
       ".inst 0xd503477f  // SMSTART ZA\n"
       "cnth x28\n"
@@ -97,4 +95,4 @@
     );
 }
 
-#endif  // defined(__ARM_FEATURE_SVE)
+#endif  // defined(ARM_COMPUTE_ENABLE_SME)