tc: update optee patches hosted in build-scripts

 * Removed 0002-plat-totalcompute-fix-TZDRAM-start-and-size.patch as
   it has now been upstreamed.
 * Rebased 0001-WIP-Enable-managed-exit.patch

Signed-off-by: Rupinderjit Singh <rupinderjit.singh@arm.com>
Change-Id: Id37d6f20c18104dcec95574d480a57d4a9ab13ef