superiotool: Add register definitions for ITE IT8783E/F

Values are taken from an unpublished datasheet. With the exception of
the default value for register 0x55 in the environment controller space:
Looks like this was just documented wrong. The dumped value of 0x50 also
makes more sense.

Change-Id: I2bd23d30b7158b2e05fcee7c6280df82570d1401
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/17004
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
1 file changed