COMPMID-3637: Move utility headers from arm_compute to src

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: If9d6fa8c900b68c4b6fd373f2fc1f9abb83ea917
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4145
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/CPUUtils.cpp b/src/runtime/CPUUtils.cpp
index 4d6caae..a7dd464 100644
--- a/src/runtime/CPUUtils.cpp
+++ b/src/runtime/CPUUtils.cpp
@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#include "arm_compute/runtime/CPUUtils.h"
+#include "src/runtime/CPUUtils.h"
 
 #include "arm_compute/core/CPP/CPPTypes.h"
 #include "arm_compute/core/Error.h"
@@ -352,6 +352,10 @@
 
 namespace arm_compute
 {
+namespace utils
+{
+namespace cpu
+{
 void get_cpu_configuration(CPUInfo &cpuinfo)
 {
 #if !defined(BARE_METAL) && (defined(__arm__) || defined(__aarch64__))
@@ -460,5 +464,6 @@
 
     return num_threads_hint;
 }
-
+} // namespace cpu
+} // namespace utils
 } // namespace arm_compute