[coreboot-gerrit] Patch merged into coreboot/master: 174a891 southbridge/intel/fsp_rangeley: fix to include irqroute.h twice

the following patch was just integrated into master:
commit 174a891121d5c474446a4fc1471387db454de6cf
Author: Martin Roth 
Date:   Mon Aug 11 12:37:24 2014 -0600

southbridge/intel/fsp_rangeley: fix to include irqroute.h twice

This matches what was done on baytrail in commit bfca984b -
    soc/intel/fsp_baytrail: set up for including irqroute.h twice

irq_helper.h intentionally gets included into irqroute.asl twice - once
    for pic mode and once for apic mode.  Since people are used to seeing
    guard statements on the .h files, add the guards to irqroute.h and add
    a comment to irq_helper.h explaining why they aren't there.

Change-Id: I709f9370ce7db1b3ffac2297aeaba5cc670ec20c
    Signed-off-by: Martin Roth 
    Reviewed-on: http://review.coreboot.org/6606
    Tested-by: build bot (Jenkins)
    Reviewed-by: Edward O'Callaghan

See http://review.coreboot.org/6606 for details.

-gerrit