i40e: Fix for persistent lldp support

[ Upstream commit ff924657 ]

This patch fixes function to read NVM module data and uses it to
read current LLDP agent configuration from NVM API version 1.8.

Signed-off-by: Sylwia Wnuczko <sylwia.wnuczko@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Stable-dep-of: d0d362ff ("i40e: Fix VF VLAN offloading when port VLAN is configured")
Signed-off-by: Sasha Levin <sashal@kernel.org>