tee: amdtee: Make use of the helper macro LIST_HEAD()

Replace "struct list_head head = LIST_HEAD_INIT(head)" with
"LIST_HEAD(head)" to simplify the code.
Signed-off-by: NCai Huoqing <cai.huoqing@linux.dev>
Reviewed-by: NRijo Thomas <Rijo-john.Thomas@amd.com>
Signed-off-by: NJens Wiklander <jens.wiklander@linaro.org>

drivers/tee/amdtee/call.c

@@ -122,7 +122,7 @@ static int amd_params_to_tee_params(struct tee_param *tee, u32 count,
 }
 
 static DEFINE_MUTEX(ta_refcount_mutex);
-static struct list_head ta_list = LIST_HEAD_INIT(ta_list);
+static LIST_HEAD(ta_list);
 
 static u32 get_ta_refcount(u32 ta_handle)
 {