meson: clk: Use builtin_platform_driver to simplify the code

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

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index e1d4aa1..aaa3e39 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -673,8 +673,4 @@
 	},
 };
 
-static int __init meson8b_clkc_init(void)
-{
-	return platform_driver_register(&meson8b_driver);
-}
-device_initcall(meson8b_clkc_init);
+builtin_platform_driver(meson8b_driver);