+ move bitfields of ExtMachInst defined in bitfields.hh to types.hh Change-Id: Ic25e2fd1a887f87231268a4449d8755593919a0f Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/68417 Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Hoa Nguyen <hoanguyen@ucdavis.edu> Reviewed-by: Roger Chang <rogerycchang@google.com>