i40e: make i40e_init_pf_fcoe to void

i40e: make i40e_init_pf_fcoe to void

Orabug: 22342532

i40e_init_pf_fcoe() didn't return anything except 0, it prints enough
error info already, and no driver logic depends on the return value,
so this can be void.

Change-ID: Ie6afad849857d87a7064c42c3cce14c74c2f29d8
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 21364bcfc7810894114ab18f5335745e374cc2ea)
Signed-off-by: Brian Maly <brian.maly@oracle.com>