drm/amd/display: Add DC_VALIDATE_MODE_AND_PROGRAMMING condition check for force odm2:1

drm/amd/display: Add DC_VALIDATE_MODE_AND_PROGRAMMING condition check for force odm2:1

[Why & How]
Need to limit force ODM 2:1 to DC_VALIDATE_MODE_AND_PROGRAMMING only,
i.e. not block isCofunc check for topology mapping allowed.

Reviewed-by: Ovidiu Bunea <ovidiu.bunea@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>