tests_l2: updated l2 readme for dsa

Signed-off-by: vbedida79 <veenadhari.bedida@intel.com>

Author: vbedida79

tests/l2/README.md

@@ -15,3 +15,6 @@ Please refer to Intel SGX provisioning validation tests [here](sgx/README.md)
 
 ### Verify Intel® QuickAssist Technology provisioning
 Please refer to Intel QAT provisioning validation tests [here](qat/README.md)
+
+### Verify Intel® Data Streaming Accelerator provisioning
+Please refer to Intel DSA provisioning validation tests [here](dsa/README.md)