Update IPsec.h file to follow approved ECR which will be collected into future UEFI...

Update IPsec.h file to follow approved ECR which will be collected into future UEFI 2.3 Specification after 2.3 errata B and future UEFI Specifications after 2.3. The changes mainly include:
  1. Add EFI_IPSEC2_PROTOCOL
  2. Remove IPsec Authentication Algorithm Definition and IPsec Encryption Algorithm
     Definition.
  3. Add EFI_IPSEC_SA_DATA2 data structure.
And also update IPv4 driver to call EFI_IPSEC2_PROTOCOL.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10941 6f19259b-4bc3-4df7-8a09-765794883524