[Why]
DCN314 supports PCON.

[How]
Explicitly enable it in dcn314 resources.
Signed-off-by: NRoman Li <roman.li@amd.com>
Reviewed-by: NHamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>