dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support

dt-bindings: nintendo-otp: Document the Wii and Wii U OTP support

Both of these consoles use the exact same two registers, even at the
same address, but the Wii U has eight banks of 128 bytes memory while
the Wii only has one, hence the two compatible strings.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210810153036.1494-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>