OvmfPkg/PeilessStartupLib: Update the define of FV_HANDOFF_TABLE_POINTERS2

OvmfPkg/PeilessStartupLib: Update the define of FV_HANDOFF_TABLE_POINTERS2

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4243

FV_HANDOFF_TABLE_POINTERS2 once was defined in IntelTdx.c. Its structure
is same as PLATFORM_FIRMWARE_BLOB2_STRUCT which is defined in
Library/TcgEventLogRecordLib.h. So this patch reuse the define of
PLATFORM_FIRMWARE_BLOB2_STRUCT as FV_HANDOFF_TABLE_POINTERS2. Furthermore
FV_HANDOFF_TABLE_POINTERS2 is renamed as CFV_HANDOFF_TABLE_POINTERS2
so that the name is more meaningful.

Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Michael Roth <michael.roth@amd.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>