ath79: remove GPIO driver earlier registration hack

After porting the ar71xx target to the new ath79 target, we are now
using the device tree instead of the device mach file. And the
platform drivers already support deferred probe. So there is no need
to keep it.

Signed-off-by: Shiji Yang <yangshiji66@qq.com>

target/linux/ath79/patches-6.6/340-register_gpio_driver_earlier.patch

@@ -1,26 +0,0 @@
-From: John Crispin <john@phrozen.org>
-Subject: ath79: Register GPIO driver earlier
-
-HACK: register the GPIO driver earlier to ensure that gpio_request calls
-from mach files succeed.
-
-Submitted-by: John Crispin <john@phrozen.org>
----
- drivers/gpio/gpio-ath79.c                     | 6 +++++-
- 1 file changed, 5 insertions(+), 1 deletion(-)
-
---- a/drivers/gpio/gpio-ath79.c
-+++ b/drivers/gpio/gpio-ath79.c
-@@ -302,7 +302,11 @@ static struct platform_driver ath79_gpio
- 	.probe = ath79_gpio_probe,
- };
- 
--module_platform_driver(ath79_gpio_driver);
-+static int __init ath79_gpio_init(void)
-+{
-+	return platform_driver_register(&ath79_gpio_driver);
-+}
-+postcore_initcall(ath79_gpio_init);
- 
- MODULE_DESCRIPTION("Atheros AR71XX/AR724X/AR913X GPIO API support");
- MODULE_LICENSE("GPL v2");