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Removed direct calling of zen kernels in cblas source itself. Similar optimizations are done by the function directly invoked from Cblas layer. The BLIS binary with dynamic dispatch feature was crashing on non-zen CPUs (specifically CPUs without AVX2 support). The crash was caused by un-supported instructions in zen optimized kernels. The issue is fixed by calling only reference kernels if the architecture detected at runtime is not zen, zen2 or zen3. AMD-Internal: [CPUPL-1930] Change-Id: I9178b7a98f2563dee2817064f37fcbb84073eeea