sw:vec: Update ITCM linker mapping

To match top_matcha.hjson
https://spacebeaker.git.corp.google.com/shodan/3p/lowrisc/opentitan/+/3d05e14abb23e275f68080b59c21e3d949176605/hw/top_matcha/data/top_matcha.hjson#749

Change-Id: I260ce989557945debb523c5240b8cd2d45c018c4
1 file changed