[Why]
User might change the suspend behaviour from OS.

[How]
Check with pm for target suspend state and set s0ix
flag only for s2idle state.

v2: User might change default suspend state, use target state
v3: squash in build fix
Suggested-by: NLijo Lazar <Lijo.Lazar@amd.com>
Signed-off-by: NPratik Vishwakarma <Pratik.Vishwakarma@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org