superio/fintek/f71869ad: Fix incorrect LDN's

Turns out there are a few minor differences of the LDN's in the AD rev.
of this Fintek chip. 0x07 is in fact the WDT so renaming and remove the
now incorrect io mask. Add missing CIR LDN functionality and touch up
src inline doc.

Change-Id: I440aebad71d62d199d3283dd061933e76b21dda5
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/5696
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
2 files changed