Disabled calling of bli_dgemm_small from gemm_front

Details:
- Decision logic to choose small_gemm has been moved to blas interface.
- Redirecting all the calls to small_gemm from gemm_front to native
  implementation.

AMD-Internal: [CPUPL-1376]
Change-Id: I6490f67113e9f7c272269f441c86f2a0b3c89a53

kernels/zen/3/bli_gemm_small.c

@@ -4,7 +4,7 @@
    An object-based framework for developing high-performance BLAS-like
    libraries.
 
-   Copyright (C) 2017 - 2020, Advanced Micro Devices, Inc.
+   Copyright (C) 2017-2021, Advanced Micro Devices, Inc. All rights reserved.
 
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
@@ -162,7 +162,7 @@ err_t bli_gemm_small
 
     if (dt == BLIS_DOUBLE)
     {
-#ifndef BLIS_ENABLE_MULTITHREADING
+#ifndef BLIS_ENABLE_MULTITHREADING    
     // bli_dgemm_small is called directly from BLAS interface for sizes within thresholds.
     // Avoiding calling bli_dgemm_small from gemm_front and directing to
     // native implementation.