mtd: m25p80: add support for Everspin MR25H256 MRAM chip

This chip isn't JEDEC-compatible.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/devices/m25p80.c

@@ -639,6 +639,9 @@ static const struct spi_device_id m25p_ids[] = {
 	{ "en25q32b", INFO(0x1c3016, 0, 64 * 1024,  64, 0) },
 	{ "en25p64", INFO(0x1c2017, 0, 64 * 1024, 128, 0) },
 
+	/* Everspin */
+	{ "mr25h256", CAT25_INFO(  32 * 1024, 1, 256, 2) },
+
 	/* Intel/Numonyx -- xxxs33b */
 	{ "160s33b",  INFO(0x898911, 0, 64 * 1024,  32, 0) },
 	{ "320s33b",  INFO(0x898912, 0, 64 * 1024,  64, 0) },