spi: Add support for Winbod W25Q64DW

The W25Q64DW spi part is programatically equivalent
to the other W25Q64 parts except it operates at 1.8V.
Just add a new entry with the appropriate ID.

BUG=chrome-os-partner:22292
BRANCH=None
TEST=SPI controller can program the part.

Change-Id: I65b0261223a9fefcb07477a43b6a3edb8228dd03
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/170011
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: http://review.coreboot.org/5077
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/drivers/spi/winbond.c

@@ -93,6 +93,14 @@ static const struct winbond_spi_flash_params winbond_spi_flash_table[] = {
 		.nr_blocks		= 128,
 		.name			= "W25Q64",
 	},
+	{
+		.id			= 0x6017,
+		.l2_page_size		= 8,
+		.pages_per_sector	= 16,
+		.sectors_per_block	= 16,
+		.nr_blocks		= 128,
+		.name			= "W25Q64DW",
+	},
 	{
 		.id			= 0x4018,
 		.l2_page_size		= 8,