Couple of instances had IP4 mentioned, instead of IPv4. Changing all to IPv4 to maintain consistency. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hegde Nagaraj P <nagaraj-p.hegde@hpe.com> Reviewed-by: Tapan Shah <tapandshah@hpe.com> Reviewed-by: Jaben Carsey <jaben.carsey@intel.com> Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>