[NUCLEO_F401RE] Add missing IT flag reset + update system clock variable
[NUCLEO_F401RE] Add missing IT flag reset + update system clock variable

Psykar/kubos,Psykar/kubos,Psykar/kubos,Psykar/kubos,Psykar/kubos,kubostech/KubOS,kubostech/KubOS,Psykar/kubos,Psykar/kubos