Gbt2CR Reset modification
KCU code are verified by PRBS testing firmware It can be merged once https://espace.cern.ch/ATLAS-FELIX/Shared%20Documents/Bitfiles_development/FLX709_GBT_RM0406_4CH_CLKSELECT_GIT_master_rm-4.6_53_190521_10_50.tar.gz is verified.