include/linux/find: Fix documentation

The order of the arguments in function documentation doesn't fit the
implementation. Change the documentation so that it corresponds to the
code. This prevent people to get confused when reading the documentation.

Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>