ice: avoid unnecessary devm_ usage

1. pcaps are free'd right after AQ routines are done, no need for
   devm_'s
2. a test frame for loopback test in ethtool -t is destroyed at the end
   of the test so we don't need devm_ here either.

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>