net/ice/base: clear error status before set FC

net/ice/base: clear error status before set FC

ice_set_fc takes a u8 pointer 'aq_failures' as an input parameter. If
this function encounters an error, in addition to returning an
appropriate ice_status enum code, it also populates aq_failures with a
link specific error value.

If the caller does not initialize this variable to 0 before calling
ice_set_fc, it would appear as if ice_set_fc returned an error code in
this variable. So initialize it to 0.

Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Acked-by: Qiming Yang <qiming.yang@intel.com>