used a modified checkstack to get the 56 number
(normally checkstack wouldn't show this low a value)

checkstack before:
0x0000012f e1000e_check_options [e1000e]:               272

after:
0x0000012f e1000e_check_options [e1000e]:                56
Signed-off-by: NJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>