devlink: introduce devlink_nl_put_u64()

Add devlink_nl_put_u64() that abstracts padding for u64 values.
All u64 values are passed with the very same padding option.

Reviewed-by: Wojciech Drewek <[e-mail]>
Reviewed-by: Jiri Pirko <[e-mail]>
Reviewed-by: Joe Damato <[e-mail]>
Signed-off-by: Przemek Kitszel <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/devlink/devl_internal.h

···
 	return 0;
 }
 
+static inline int devlink_nl_put_u64(struct sk_buff *msg, int attrtype, u64 val)
+{
+	return nla_put_u64_64bit(msg, attrtype, val, DEVLINK_ATTR_PAD);
+}
+
 int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,
 				 struct devlink *devlink, int attrtype);
 int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info);