COMPMID-2841: Enable aarch32 builds

Decouples the execution state from the architecture.
Now architectures can be set as (armv7a, armv8a, etc) and execution
state using the `estate` flag with the following options (auto, 32, 64).

Change-Id: Ie7f757b3565495a39c7e20fb350a72fd9c5a2a4f
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2438
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/NEON/kernels/NESelectKernel.cpp b/src/core/NEON/kernels/NESelectKernel.cpp
index 72afe4f..191d182 100644
--- a/src/core/NEON/kernels/NESelectKernel.cpp
+++ b/src/core/NEON/kernels/NESelectKernel.cpp
@@ -197,7 +197,7 @@
         };
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
         map_function["op_F16"] = &select_op_16<float16_t, uint16x8_t>;
-#endif /* ARM_COMPUTE_AARCH64_V8_2 */
+#endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
     }
     else
     {
@@ -213,7 +213,7 @@
         };
 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
         map_function["op_F16"] = &select_op_not_same_rank<float16_t>;
-#endif /* ARM_COMPUTE_AARCH64_V8_2 */
+#endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
     }
 
     auto it = map_function.find(function_to_call);