COMPMID-634: Enable clang with libc++ to compile for Android (32 and 64 bits)

Change-Id: I693f64e70cd478e93675a8b04360128ded3b60d4
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/93015
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/src/core/NEON/kernels/arm64/NEGEMMLowpAArch64V8P4Kernel.cpp b/src/core/NEON/kernels/arm64/NEGEMMLowpAArch64V8P4Kernel.cpp
index 939f1b7..8728e77 100644
--- a/src/core/NEON/kernels/arm64/NEGEMMLowpAArch64V8P4Kernel.cpp
+++ b/src/core/NEON/kernels/arm64/NEGEMMLowpAArch64V8P4Kernel.cpp
@@ -39,6 +39,9 @@
 #include <cstddef>
 #include <cstdint>
 
+// Enable only if compiled for AArch64-V8.2-A targets
+#ifdef ARM_COMPUTE_AARCH64_V8_2
+
 #define ASM_PREFETCH(address) "PRFM PLDL1KEEP, " address "\n"
 #define ASM_PREFETCHL2(address) "PRFM PLDL2KEEP, " address "\n"
 #define ASM_PREFETCHW(address) "PRFM PSTL1KEEP, " address "\n"
@@ -517,3 +520,4 @@
     }
 }
 } // namespace arm_compute
+#endif /* ARM_COMPUTE_AARCH64_V8_2 */