net/e1000/base: expose more future extended NVM
net/e1000/base: expose more future extended NVM

Future extended NVM 5 (five) required for a Dynamic Power Gating
control in the MAC.

Signed-off-by: Sasha Neftin <f7bfbd396c242d85586ef7eabf51a568b2483fc1@intel.com>
Signed-off-by: Guinan Sun <2859c668e0b5b1e71d3c9d7ddf700c8e237b77a7@intel.com>
Reviewed-by: Wei Zhao <55941fd0e75edbdf274af2cfac8f147525678f08@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk