Add support for CLVK

This patch enables CLVK through the graph API and inside the
CLScheduler. By default the Native platform is selected.
Selecting CLVK can be done via --target=clvk.

Resolves COMPMID-4205 and COMPMID-4206

Change-Id: Ic60744980c6b8a60e776627ea677ed46be88f656
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5475
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/graph/TypeLoader.cpp b/src/graph/TypeLoader.cpp
index 8efd66f..3c51289 100644
--- a/src/graph/TypeLoader.cpp
+++ b/src/graph/TypeLoader.cpp
@@ -59,6 +59,7 @@
     {
         { "neon", Target::NEON },
         { "cl", Target::CL },
+        { "clvk", Target::CLVK },
     };
 
 #ifndef ARM_COMPUTE_EXCEPTIONS_DISABLED