e1000: cleanup pre-processor tags
The codes has been exposed correctly, so remove pre-processor tags.
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Reviewed-by: Wei Zhao <wei.zhao1@intel.com>
Approved by: imp
Obtained from: DPDK (a50e998a0fd94e5db508710868a3417b1846425c)
MFC after: 1 week