gpio: mm-lantiq: Fix small typo

Fix a spelling typo in gpio-mm-lantiq.c by codespell
s/dont/don't/

Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Link: https://lore.kernel.org/r/20200424154103.10311-3-zhengdejin5@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-mm-lantiq.c

@@ -36,7 +36,7 @@ struct ltq_mm {
  * @chip:     Pointer to our private data structure.
  *
  * Write the shadow value to the EBU to set the gpios. We need to set the
- * global EBU lock to make sure that PCI/MTD dont break.
+ * global EBU lock to make sure that PCI/MTD don't break.
  */
 static void ltq_mm_apply(struct ltq_mm *chip)
 {