test/crypto: refactor DOCSIS to show hidden cases

test/crypto: refactor DOCSIS to show hidden cases

In the current implementation, the DOCSIS test cases are running
and being reported as one test, despite the fact that multiple
test cases are hidden inside i.e. "test_DOCSIS_PROTO_all" runs
52 test cases. Each DOCSIS test case should be reported individually
instead.

This commit achieves this by removing the use of the
test_DOCSIS_PROTO_all function and statically listing the test cases
to run when building the test suite, which are then reported to the
user by description.

Signed-off-by: Rebecca Troy <rebecca.troy@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>
Reviewed-by: David Coyle <david.coyle@intel.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>