mtd: spi-nor: Add support for w25q256jwm

Add support for Winbond 256M-bit flash w25q256jwm.
Performed basic erase/write/readback operations on
ZynqMP zc1751+dc1 board.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@amd.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/mtd/spi/spi-nor-ids.c b/drivers/mtd/spi/spi-nor-ids.c
index ecb9ded..4587215 100644
--- a/drivers/mtd/spi/spi-nor-ids.c
+++ b/drivers/mtd/spi/spi-nor-ids.c
@@ -446,6 +446,11 @@
 			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
 			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
 	},
+	{
+		INFO("w25q256jwm", 0xef8019, 0, 64 * 1024, 512,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
 	{ INFO("w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K) },
 	{
 		INFO("w25q64dw", 0xef6017, 0, 64 * 1024, 128,