NXP backend: Fix NeutronConfig copy callback signature to match the driver header

Author: milesmanxp

.github/workflows/pull.yml

@@ -1745,7 +1745,7 @@ jobs:
         conda activate "${CONDA_ENV}"
 
         # Build
-        cmake -DEXECUTORCH_BUILD_NXP_NEUTRON=ON -Bcmake-out .
+        cmake -DEXECUTORCH_BUILD_NXP_NEUTRON=ON -DEXECUTORCH_BUILD_NXP_NEUTRON_EXTERNAL_MEM=ON -Bcmake-out .
         cmake --build cmake-out --target executorch_delegate_neutron --config Release
 
         # Build check for the neutron backend library

backends/nxp/CMakeLists.txt

@@ -6,6 +6,10 @@
 set(_common_include_directories ${CMAKE_CURRENT_SOURCE_DIR}/../../..)
 add_compile_definitions(C10_USING_CUSTOM_GENERATED_MACROS)
 
+if(EXECUTORCH_BUILD_NXP_NEUTRON_EXTERNAL_MEM)
+  add_compile_definitions(EXTERNAL_MEM)
+endif()
+
 set(_neutron_sources ${CMAKE_CURRENT_SOURCE_DIR}/runtime/NeutronBackend.cpp)
 
 add_library(executorch_delegate_neutron STATIC ${_neutron_sources})

backends/nxp/runtime/NeutronBackend.cpp

@@ -111,7 +111,8 @@ typedef struct {
 // Neutron compute has no access to FLASH.
 // Prefetch weights from FLASH to SRAM using memcpy.
 // For a model converted with --fetch_constants_to_sram.
-void copy(void* dst, const void* src, uint32_t size, uint32_t channel) {
+// cppcheck-suppress constParameterCallback
+void copy(void* dst, void* src, uint32_t size, uint32_t channel) {
   memcpy(dst, src, size);
 }
 void wait(uint32_t channel) {}