Return 'enable' bit false for Get LAN Config Param 56 & 59
Return 'enable' bit false for Get LAN Config Param 56 & 59

The IPMI Get LAN Config Parameter 56 and 59 have different bit
definitions for data byte 2. The Static IPv6 (Param 56) defines bit 7
as the 'enable' bit. Param 59 reserves bit 7.

Tested:
Assigned a static IPv6 address
'ipmitool raw 0xc 2 <nic> 56 0 0' data byte 2 returns 0x80
'ipmitool raw 0xc 2 <nic> 59 0 0' data byte 2 returns 0x00
Assigned DHCP IPv6
'ipmitool raw 0xc 2 <nic> 56 0 0' data byte 2 returns 0x00
'ipmitool raw 0xc 2 <nic> 59 0 0' data byte 2 returns 0x02

Change-Id: I1f5a8cd3ea70088bbd94d0e51805a9c5a1a168fa
Signed-off-by: Johnathan Mantey <0048b8e2f791bacb0830da233adbf1612889167c@intel.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid