gpio: max732x: Remove duplicate NULL check

Since i2c_unregister_device() became NULL-aware we may remove duplicate
NULL check.

Cc: Linus Walleij <[email protected]>
Cc: [email protected]
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Linus Walleij <[email protected]>
1 file changed