ice: make const read-only array dflt_rules static

Don't populate the const read-only array dflt_rules on the stack at run
time, instead make it static.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Tested-by: Rinitha S <sx.rinitha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>