Fixed compilation errors for gcc versions < 11.2

Details:
- Disabled intrinsics code of f32obf16 pack function
  for gcc < 11.2 as the instructions used in kernels
  are not supported by the compiler versions.
- Addded early-return check for WOQ APIs when compiling with
  gcc < 11.2
- Fixed code to check whether JIT kernels are generated inside
  batch_gemm API for bf16 datatype.

AMD Internal: [CPUPL-6327]

Change-Id: I0a017c67eb9d9d22a14e095e435dc397e265fb0a

bench/bench_aocl_gemm/bench_batch_lpgemm.c

@@ -1590,7 +1590,7 @@ int main( int argc, char** argv )
                     post_ops_str_dest, TRUE
                 );
             }
-            skip_exec:
+            skip_exec:;
         }
     }