ethtool.h: remind to update 802.3ad when adding new speeds

Each time a new speed is added, the bonding 802.3ad isn't updated. Add a
comment to remind the developer to update this driver.

Signed-off-by: Nicolas Dichtel <[e-mail]>
Acked-by: Andy Gospodarek <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

include/uapi/linux/ethtool.h

···
  * it was forced up into this mode or autonegotiated.
  */
 
-/* The forced speed, in units of 1Mb. All values 0 to INT_MAX are legal. */
-/* Update drivers/net/phy/phy.c:phy_speed_to_str() when adding new values */
+/* The forced speed, in units of 1Mb. All values 0 to INT_MAX are legal.
+ * Update drivers/net/phy/phy.c:phy_speed_to_str() and
+ * drivers/net/bonding/bond_3ad.c:__get_link_speed() when adding new values.
+ */
 #define SPEED_10		10
 #define SPEED_100		100
 #define SPEED_1000		1000