SWDEV-452538 - Cast functions directly to void* instead of casting to function pointer

This change fixes build warning when compiled with -Wcast-function-type flag

Signed-off-by: Sebastian Luzynski <Sebastian.Luzynski@amd.com>
Change-Id: If60abf5c6855879a07375c166d7cb9ff6cd6fe5d

catch/unit/cooperativeGrps/hipCGMultiGridGroupType_old.cc

@@ -480,20 +480,20 @@ TEST_CASE("Unit_hipCGMultiGridGroupType_Basic") {
     max_threads_per_blk = min(max_threads_per_blk, device_properties.maxThreadsPerBlock);
   }
 
-  void* (*kernel_func)(void);
+  void* kernel_func;
   bool specific_api_test = false;
 
   SECTION("Default multi grid group API test") {
-    kernel_func = reinterpret_cast<void* (*)()>(kernel_cg_multi_grid_group_type);
+    kernel_func = reinterpret_cast<void*>(kernel_cg_multi_grid_group_type);
     specific_api_test = true;
   }
 
   SECTION("Base type multi grid group API test") {
-    kernel_func = reinterpret_cast<void* (*)()>(kernel_cg_multi_grid_group_type_via_base_type);
+    kernel_func = reinterpret_cast<void*>(kernel_cg_multi_grid_group_type_via_base_type);
   }
 
   SECTION("Public API multi grid group test") {
-    kernel_func = reinterpret_cast<void* (*)()>(kernel_cg_multi_grid_group_type_via_public_api);
+    kernel_func = reinterpret_cast<void*>(kernel_cg_multi_grid_group_type_via_public_api);
   }
 
   // Test for blockSizes in powers of 2