Delete 'case I40E_VIRTCHNL_OP_FCOE', as it is not necessary. The
default case reports on all unsupported commands included this one.
This also prevents warnings about a missing "break" at the end of the
"case" block.
Coverity issue: 13265
Fixes: 4861cde46116 ("i40e: new poll mode driver")
Signed-off-by: Helin Zhang <helin.zhang@intel.com> Acked-by: John McNamara <john.mcnamara@intel.com>