irqchip/meson-gpio: Drop unused module alias

The driver has never supported anything but OF probing so drop the
unused platform alias that was erroneously added by commit a947aa0
("irqchip/meson-gpio: Make it possible to build as a module").

Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Author: jhovold

drivers/irqchip/irq-meson-gpio.c

@@ -637,4 +637,3 @@ IRQCHIP_PLATFORM_DRIVER_END(meson_gpio_intc)
 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 MODULE_DESCRIPTION("Meson GPIO Interrupt Multiplexer driver");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:meson-gpio-intc");