Drivers: hv: utils: 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: Cai Huoqing <cai.huoqing@linux.dev>
Link: https://lore.kernel.org/r/20220209032251.37362-1-cai.huoqing@linux.devSigned-off-by: Wei Liu <wei.liu@kernel.org>

drivers/hv/hv_utils_transport.c

@@ -13,7 +13,7 @@
 #include "hv_utils_transport.h"
 
 static DEFINE_SPINLOCK(hvt_list_lock);
-static struct list_head hvt_list = LIST_HEAD_INIT(hvt_list);
+static LIST_HEAD(hvt_list);
 
 static void hvt_reset(struct hvutil_transport *hvt)
 {