util/superiotool: add support for chip ITE IT8623E

Due to the lack of a datasheet, defaults are shown as
"not available (NA)" in the register dump.

Change-Id: I6baaf5dd95453fb1265425f357ea16c710c006ba
Signed-off-by: Gergely Kiss <mail.gery@gmail.com>
Reviewed-on: https://review.coreboot.org/23084
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
1 file changed