ocxl: 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.

Acked-by: Frederic Barrat <[e-mail]>
Acked-by: Andrew Donnellan <[e-mail]>
Signed-off-by: Cai Huoqing <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/ocxl/link.c

···
 	struct spa *spa;
 	void *platform_data;
 };
-static struct list_head links_list = LIST_HEAD_INIT(links_list);
+static LIST_HEAD(links_list);
 static DEFINE_MUTEX(links_list_lock);
 
 enum xsl_response {