iwlwifi: mvm: remove IWL_UCODE_TLV_API_HDC_PHASE_0 TLV flag

All the supported firwmares support the new API.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>