BLAS Extension API - ?gemm_compute()

- Added support for 2 new APIs:
	1. sgemm_compute()
	2. dgemm_compute()
  These are dependent on the ?gemm_pack_get_size() and ?gemm_pack()
  APIs.
- ?gemm_compute() takes the packed matrix buffer (represented by the
  packed matrix identifier) and performs the GEMM operation:
  C := A * B + beta * C.
- Whenever the kernel storage preference and the matrix storage
  scheme isn't matching, and the respective matrix being loaded isn't
  packed either, on-the-go packing has been enabled for such cases to
  pack that matrix.
- Note: If both the matrices are packed using the ?gemm_pack() API,
  it is the responsibility of the user to pack only one matrix with
  alpha scalar and the other with a unit scalar.
- Note: Support is presently limited to Single Thread only. Both, pack
  and compute APIs are forced to take n_threads=1.

AMD-Internal: [CPUPL-3560]
Change-Id: I825d98a0a5038d31668d2a4b84b3ccc204e6c158

frame/thread/bli_thread.h

@@ -60,6 +60,9 @@
 // Include the pack full thread decorator and related definitions and prototypes
 // for the pack code path.
 #include "bli_pack_full_decor.h"
+// Include the level-3 thread decorator and related definitions and prototypes
+// for the compute code path.
+#include "bli_l3_compute_decor.h"
 
 // Initialization-related prototypes.
 void bli_thread_init( void );