cpu/intel/fsp_model_406dx: code cleanup

Code cleanup requested in commit 09670265 -
"cpu/intel: Add fsp version of model 406dx (Rangeley / Atom C2000)"

- add guard statements to chip.h
- remove excessive includes
- whitespace cleanup
- add an IS_ENABLED

Change-Id: Iaa85bd66953df015f083b23f6fd32949bcfd17bc
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6599
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
mainboard/XXX/YYY/dsdt.asl: Whitespace fix

Use tab between "COREBOOT", and comment.

This fix was requested in 90957f88 -
"mainboard/intel: Add Mohon Peak CRB for Intel's atom c2000"

Change-Id: If9fb6158cca95341ab57db1125e85648b616b72c
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6601
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
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 <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6606
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
mainboard/intel/mohonpeak: code cleanup

Code cleanup requested in commit 90957f88 -
"mainboard/intel: Add Mohon Peak CRB for Intel's atom c2000"

- Change com2 to COM2 in Kconfig text
- clean up includes of headers
- fix whitespace

Change-Id: I828bc4781ee7de95be5546206c5d6033b75293d9
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/6607
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>