add note for EFI_SW_PEI_EC_INVALID_CAPSULE_DESCRIPTOR and EFI_SW_PEI_PC_RECOVERY_BEGIN to express they are different with the current PI specification 1.2.
add note for EFI_SW_PEI_EC_INVALID_CAPSULE_DESCRIPTOR and EFI_SW_PEI_PC_RECOVERY_BEGIN to express they are different with the current PI specification 1.2.

git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@11134 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2