net/ice: fix RSS flow destroy

net/ice: fix RSS flow destroy

In ice_hash_create(), whatever the hash_function is, the
filter_ptr->symm is always 0 and when we destroy the flow, the
ice_rem_rss_cfg() is never carried out. So the destroy function never
works well. The patch fixes this issue and at the same time
distinguishes between simple_xor and symmetric_toeplitz.

To fix this issue, the patch adds a new structure to include a flag to
indicate if it is a simple_xor flow so that it's easier to remove the
config when destroying the flow. The patch also simplifies code
implementation logic in ice_hash_create().

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

Signed-off-by: Simei Su <simei.su@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>