SPI: Add Macronix part MX25U12835F

Change-Id: I82482419afdf536a19b99c79131fa5844aaaec07
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7432
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)

src/drivers/spi/macronix.c

@@ -127,6 +127,14 @@ static const struct macronix_spi_flash_params macronix_spi_flash_table[] = {
 		.nr_blocks = 128,
 		.name = "MX25U6435F",
 	},
+	{
+		.idcode = 0x2538,
+		.page_size = 256,
+		.pages_per_sector = 16,
+		.sectors_per_block = 16,
+		.nr_blocks = 256,
+		.name = "MX25U12835F",
+	},
 	{
 		.idcode = 0x9517,
 		.page_size = 256,