net/ice: ignore error when removing RSS rule

net/ice: ignore error when removing RSS rule

Currently, multiple rte_flow RSS rules may map to the same
hardware rule if a later rule is just for input set change or
symm turn on/off. So after one of the rules be destroyed, we will
get error ICE_ERR_DOES_NOT_EXIST when destroying any other rules.
The patch simply fixes this by ignoring this error. A more
sophisticated fix that remember the sequence and replay properly
will be provided in the future.

Fixes: 5ad3db8d4bdd ("net/ice: enable advanced RSS")

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>