util/superiotool: Add initial support for Fintek F71869ED.

Datasheet: http://www.fintek.com.tw/files/productfiles/F71869_V1.1.pdf
Practically the same as F71869AD, just another ID (0x1408).
Tested on actual hardware, Jetway NC9C-550-LF.

Update:
Fixed F71869ED based on the proper datasheet:
http://www.alldatasheet.com/datasheet-pdf/pdf/459075/FINTEK/F71869ED.html

Change-Id: I5da858565ca16ba4d73b47b42fadd31dabbc290b
Signed-off-by: Wilbert Duijvenvoorde <w.a.n.duijvenvoorde@gmail.com>
Reviewed-on: http://review.coreboot.org/5380
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Idwer Vollering <vidwer@gmail.com>