tests/amdgpu: expand secure param for exec_cs_helper (v2)

This patch expands secure param for amdgpu_test_exec_cs_helper_raw.
The flag is transfered to kernel with cs.

v2: squash in change from context to IB flag

Acked-by: Huang Rui <ray.huang@amd.com>
Acked-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>