Capture TransferList address from register x3 Refer to section 3 of the FW Handoff Specification https://firmwarehandoff.github.io/firmware_handoff The TransferList header is present at the base address captured by this variable. For platforms with no TransferList support, boot continues without any errors. Signed-off-by: Prachotan Reddy Bathi <Prachotan.Bathi@arm.com>