gflt400: Use AVANTA_MC_RSFU from Marvell's SDK

Previous upgrade to SDK_2.7.25-thunderbolt_v1 in
go/fibercl/82563

incorrectly used files from the
"SDK_2.7.25-thunderbolt_v1/Source/ConfigFiles/Products/AVANTA_MC_SFU"
directory instead of
"SDK_2.7.25-thunderbolt_v1/Source/ConfigFiles/Products/AVANTA_MC_RSFU"

This cl fixes that

Change-Id: Idc4ebef2d5d872cd528139ebbe7661c1d9b12398
3 files changed