mtd: m25p80: add support for Micron N25Q256A

The manufacturer datasheet can be found on the Micron website,
under the name n25q_256mb_3v_65nm.pdf:

http://www.micron.com/search?source=ps&q=n25q_256mb_3v_65nm

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/devices/m25p80.c

@@ -662,6 +662,9 @@ static const struct spi_device_id m25p_ids[] = {
 	{ "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, 0) },
 	{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
 
+	/* Micron */
+	{ "n25q256a", INFO(0x20ba19, 0, 64 * 1024, 512, SECT_4K) },
+
 	/* Spansion -- single (large) sector size only, at least
 	 * for the chips listed here (without boot sectors).
 	 */