ipw2x00: move to kstrto* functions

There is better to use kstrto* instead of simple_strtoul. In this case it
applies a bit stricter rules for input as well.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
1 file changed