bonding: fix ad_select module param check

bonding: fix ad_select module param check

Obvious copy/paste error when I converted the ad_select to the new
option API. "lacp_rate" there should be "ad_select" so we can get the
proper value.

CC: Jay Vosburgh <[email protected]>
CC: Veaceslav Falico <[email protected]>
CC: Andy Gospodarek <[email protected]>
CC: David S. Miller <[email protected]>
Fixes: 9e5f5eebe765 ("bonding: convert ad_select to use the new option
API")
Reported-by: Karim Scheik <[email protected]>
Signed-off-by: Nikolay Aleksandrov <[email protected]>
Signed-off-by: David S. Miller <[email protected]>