update hit func for global entry

* All the remain_set are set to the corresponding value before entering the s_release_req state
* set remain_clr to 0 when state change from s_release_req(probe) to
  s_release_req(release)

# MFC will preserve the whole combMem in RTL. It will not remove unused fields in combMem.

# Conflicts:
#	src/main/scala/system/SoC.scala