P9 Cumulus InitCompiler supports - Part 2

  Rename Nimbus only initfiles to p9n.xxx.initfile
  Update scan_procedures.mk, generate_wrapper.pl to support new names.
  Update initfiles.mk to take in p9c chip type

Change-Id: I4deec2e08b9c0d1507b50d5e02aab2fbdfc09b4b
Original-Change-Id: I6aeb04999c6c140f6347ce24f1ce47bffb8990f4
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40782
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Joseph J. McGill <jmcgill@us.ibm.com>
Reviewed-by: Richard J. Knight <rjknight@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/42113
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>