mtd: spi-nor: Add support for Micron n25q032a

The N25Q032A is identical to the N25Q032 except it has a different
supply voltage range. Therefore, it has a new JEDEC ID.

Signed-off-by: Aurelien Chanot <chanot.a@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>