drm/amd/pm: Increase SMUv13.0.6 mode-2 reset time

On SOCs with SMUv13.0.6, mode-2 reset takes a bit longer. Wait for 200ms
before trying to restore config space after mode-2 reset.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Asad Kamal <asad.kamal@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>