clk: zx296718: use builtin_platform_driver to simplify the code

Use the builtin_platform_driver() macro to make the code simpler.

Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/zte/clk-zx296718.c

···
 	},
 };
 
-static int __init zx_clkc_init(void)
-{
-	return platform_driver_register(&zx_clk_driver);
-}
-device_initcall(zx_clkc_init);
+builtin_platform_driver(zx_clk_driver);