Replace of_clk_get with devm_clk_get_enabled to manage the clock source.

Fixes: 5ae4cb94 ("gpio: aspeed: Add debounce support")
Reviewed-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Link: https://lore.kernel.org/r/20241008081450.1490955-3-billy_tsai@aspeedtech.comSigned-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>