Fix the build error in DCF when CONFIG_RTE_LIBRTE_ICE_16BYTE_RX_DESC
compilation option is enabled. Legacy 16 byte Rx descriptor is not
supported in DCF. If it is enabled, DCF configuration stops.
Fixes: 929eceefaba7 ("net/ice: add queue start and stop for DCF")
Signed-off-by: Ting Xu <ting.xu@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>