1. Added Tanh approximation based GeLU Post-Op for S16, S32 and BF16
2. Changes are done at frame and micro-kernel level to
implement this post-op.
3. Efficient AVX-512 and AVX-2 vector versions of TANHF and EXPF
functions are implemented for the GeLU post-operation.
4. TANH and EXPF math functions are efficiently implemented in
macro-based fashion to exploit register level fusion of GeLU
with GEMM operations for improved performance
5. LPGEMM bench is changed to pass GeLU post-op as input and
support accuracy check to verify functional correctness
AMD-Internal: [CPUPL-2978]
Change-Id: I472ac35c00a4ea1ab983cc5f6ff6a123c8035f28
672544bc04