ice: synchronize_rcu() when terminating rings

ice: synchronize_rcu() when terminating rings

Unfortunately, the ice driver doesn't respect the RCU critical section that
XSK wakeup is surrounded with. To fix this, add synchronize_rcu() calls to
paths that destroy resources that might be in use.

This was addressed in other AF_XDP ZC enabled drivers, for reference see
for example commit 8ea5bfcc431c ("net/i40e: Fix concurrency issues
between config flow and XSK")

Fixes: 222ff8e45f21 ("ice: Add support for XDP")
Fixes: a40d09f79c37 ("ice: Add support for AF_XDP")
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: Shwetha Nagaraju <shwetha.nagaraju@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>