drm/amd/amdgpu: Move init flag to after init in sw_init() (DCEv11)

Don't set config_init to true until all config statements pass.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>