superio/acpi: allow 3 I/O ranges on generic device

Some Super I/O logical devices have three I/O port ranges, such as the
GPIO on the IT8720F. Allow specifying a third I/O range. While here, fix
a typo in the I/O range description.

Change-Id: Idad03f3881e0fbf2135562316d177972f931afec
Signed-off-by: Samuel Holland <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Martin Roth <>
Reviewed-by: Paul Menzel <>
Reviewed-by: Felix Held <>
2 files changed