wifi: nl80211: Fix reading NL80211_ATTR_MLO_LINK_ID in nl80211_pre_doit

nl80211_pre_doit() using nla_get_u16() to read u8 attribute
NL80211_ATTR_MLO_LINK_ID. Fix this by using nla_get_u8() to
read NL80211_ATTR_MLO_LINK_ID attribute.
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/1657517683-5724-1-git-send-email-quic_vjakkam@quicinc.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/nl80211.c

@@ -15835,7 +15835,7 @@ static int nl80211_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
 		/* MLO -> require valid link ID */
 		if (wdev->valid_links &&
 		    (!link_id ||
-		     !(wdev->valid_links & BIT(nla_get_u16(link_id))))) {
+		     !(wdev->valid_links & BIT(nla_get_u8(link_id))))) {
 			err = -EINVAL;
 			goto out_unlock;
 		}