Pass QP8 flag only for Kleidi QB4W (#6220)

Summary: Pull Request resolved: #6220

Reviewed By: kimishpatel

Differential Revision: D64434928

Pulled By: digantdesai

fbshipit-source-id: f272ee0034606e42b60d197270dfa0e5fe7d70cd

Author: digantdesai

backends/xnnpack/CMakeLists.txt

@@ -39,7 +39,7 @@ option(EXECUTORCH_XNNPACK_SHARED_WORKSPACE
 # Keeping this OFF by default due to regressions in decode
 # and model load with kleidi kernels
 option(EXECUTORCH_XNNPACK_ENABLE_KLEIDI
-  "Enable workspace sharing across different delegate instances" OFF)
+  "Enable Arm Kleidi kernels" OFF)
 if(EXECUTORCH_XNNPACK_SHARED_WORKSPACE)
   add_definitions(-DENABLE_XNNPACK_SHARED_WORKSPACE)
 endif()