mtd: spi-nor: Add support for Macronix mx66l1g45g spi flash

These modules are used on the OpenPOWER Witherspoon systems to hold
the POWER9 host firmware image. The SPI_NOR_DUAL_READ flags is added
for the Aspeed SoCs which do not support QUAD reads.

OpenBMC-Staging-Count: 1
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Joel Stanley <joel@jms.id.au>

drivers/mtd/spi-nor/spi-nor.c

@@ -877,6 +877,7 @@ static const struct flash_info spi_nor_ids[] = {
 	{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K) },
 	{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
 	{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_QUAD_READ) },
+	{ "mx66l1g45g",  INFO(0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
 	{ "mx66l1g55g",  INFO(0xc2261b, 0, 64 * 1024, 2048, SPI_NOR_QUAD_READ) },
 
 	/* Micron */