Move massive initialization routine to the bottom of miscregs.cc. Additionally, share register metadata across ISA instances by making lookUpMiscReg a static member of the ISA and only initializing it once. Change-Id: I6d6ab26200c4e781151cc6efd97ce2420e2bf4cc Signed-off-by: Curtis Dunham <Curtis.Dunham@arm.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Jack Travaglini <giacomo.travaglini@arm.com> Reviewed-on: https://gem5-review.googlesource.com/6803 Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>