dt-bindings: eeprom-93xx46: Add support for 93C46, 93C56 and 93C66

These devices differ by the size of their storage, which is why they
have different compatible strings.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Link: https://lore.kernel.org/r/20210511210727.24895-4-linkmauve@linkmauve.fr


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>