soc: hisilicon: kunpeng_hccs: Fix discard ‘const’ qualifier compiling warning

The link_fsm_map has ‘const’ qualifier, but the 'str' pointer
in link_fsm_map is discarded. So add 'const' for this pointer
to fix the compiling warning.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

Author: LiHuiSong1

drivers/soc/hisilicon/kunpeng_hccs.c

@@ -961,7 +961,7 @@ static ssize_t link_fsm_show(struct kobject *kobj,
 	struct hccs_link_status link_status = {0};
 	const struct {
 		u8 link_fsm;
-		char *str;
+		const char *str;
 	} link_fsm_map[] = {
 		{HCCS_PORT_RESET, "reset"},
 		{HCCS_PORT_SETUP, "setup"},