eeprom: at25: Add example part numbers

To save the interested reader some time, add examples of AT25 part
numbers that correspond to EEPROMs rather than flashes.
Signed-off-by: NJonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20201107133337.1066271-1-j.neuschaefer@gmx.netSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/eeprom/at25.c

@@ -22,6 +22,9 @@
  * mean that some AT25 products are EEPROMs, and others are FLASH.
  * Handle FLASH chips with the drivers/mtd/devices/m25p80.c driver,
  * not this one!
+ *
+ * EEPROMs that can be used with this driver include, for example:
+ *   AT25M02, AT25128B
  */
 
 struct at25_data {