[Why]
DCN21 and DCN2 extended timeout support cap is not set correctly.

[How]
Set extended timeout support for ASIC families to their right values.
Signed-off-by: Nabdoulaye berthe <abdoulaye.berthe@amd.com>
Reviewed-by: NMartin Leung <Martin.Leung@amd.com>
Acked-by: NRodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>