dt-bindings: at24: add compatible for nxp,se97b

The datasheet talks about the chip being an spd, but the chip is writable
so atmel,24c02 is more appropriate as fallback.

Signed-off-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

Documentation/devicetree/bindings/eeprom/at24.txt

@@ -46,6 +46,7 @@ Required properties:
                 Some vendors use different model names for chips which are just
                 variants of the above. Known such exceptions are listed below:
 
+                "nxp,se97b" - the fallback is "atmel,24c02",
                 "renesas,r1ex24002" - the fallback is "atmel,24c02"
 
   - reg: The I2C address of the EEPROM.