clk: mediatek: assign the initial value to clk_init_data of mtk_mux

When some new clock supports are introduced, e.g. [1]
it might lead to an error although it should be NULL because
clk_init_data is on the stack and it might have random values
if using without initialization.
Add the missing initial value to clk_init_data.

[1] https://android-review.googlesource.com/c/kernel/common/+/1278046

Fixes: a3ae549 ("clk: mediatek: Add new clkmux register API")
Signed-off-by: Weiyi Lu <[email protected]>
Reviewed-by: Matthias Brugger <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Stephen Boyd <[email protected]>

Author: WeiyiLu-MediaTek

drivers/clk/mediatek/clk-mux.c

@@ -160,7 +160,7 @@ struct clk *mtk_clk_register_mux(const struct mtk_mux *mux,
 				 spinlock_t *lock)
 {
 	struct mtk_clk_mux *clk_mux;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk *clk;
 
 	clk_mux = kzalloc(sizeof(*clk_mux), GFP_KERNEL);