net: devlink: convert devlink_port_attrs bools to bits

In order to save space in the struct, convert bools to bits.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/devlink.h

@@ -41,10 +41,10 @@ struct devlink {
 };
 
 struct devlink_port_attrs {
-	bool set;
+	u8 set:1,
+	   split:1;
 	enum devlink_port_flavour flavour;
 	u32 port_number; /* same value as "split group" */
-	bool split;
 	u32 split_subport_number;
 };