gpio: max77650: add MODULE_ALIAS()

Define a MODULE_ALIAS() in the gpio sub-driver for max77650 so that
the appropriate module gets loaded together with the core mfd driver.

Signed-off-by: Bartosz Golaszewski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-max77650.c

···
 MODULE_DESCRIPTION("MAXIM 77650/77651 GPIO driver");
 MODULE_AUTHOR("Bartosz Golaszewski <[e-mail]>");
 MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:max77650-gpio");