mtd: spi-nor: Add support for Spansion S25FL256L

The S25FL256L is a part of the S25FL-L family and has the same feature set
as S25FL128L except the density.

The datasheet can be found in the following link.
https://www.cypress.com/file/316171/download

The S25FL256L is 32MB NOR Flash that does not support Bank Address
Register. This fixup is activated if CONFIG_SPI_FLASH_BAR is enabled and
returns ENOTSUPP in setup() hook to avoid further ops.

Tested on Xilinx Zynq-7000 FPGA board.

Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
diff --git a/drivers/mtd/spi/spi-nor-ids.c b/drivers/mtd/spi/spi-nor-ids.c
index 08b2571..3e0935e 100644
--- a/drivers/mtd/spi/spi-nor-ids.c
+++ b/drivers/mtd/spi/spi-nor-ids.c
@@ -233,6 +233,7 @@
 	{ INFO("s25fl208k",  0x014014,      0,  64 * 1024,  16, SECT_4K | SPI_NOR_DUAL_READ) },
 	{ INFO("s25fl064l",  0x016017,      0,  64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
 	{ INFO("s25fl128l",  0x016018,      0,  64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("s25fl256l",  0x016019,      0,  64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
 	{ INFO6("s25hl512t",  0x342a1a, 0x0f0390, 256 * 1024, 256,
 		SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES |
 		USE_CLSR) },