SPI: Add Eon EN25S64 support.

BUG=chrome-os-partner:25907
BRANCH=baytrail(rambi)
TEST=Read and write MRC and ELOG on Glimmer with Eon device.

Original-Change-Id: If883ff6eb14dd49a06f57a01ca61661854ded78d
Original-Reviewed-on: https://chromium-review.googlesource.com/198324
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Commit-Queue: Marc Jones <marc.jones@se-eng.com>
Original-Tested-by: Marc Jones <marc.jones@se-eng.com>
(cherry picked from commit 536c34c2d92178f4e62b8ca7cfffceaf80a305f6)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I199451ed2b29c55bfb5e1487afa8cf3b9978e63e
Reviewed-on: http://review.coreboot.org/7935
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
diff --git a/src/drivers/spi/eon.c b/src/drivers/spi/eon.c
index 2e5fa8c..684fb2e 100644
--- a/src/drivers/spi/eon.c
+++ b/src/drivers/spi/eon.c
@@ -26,6 +26,7 @@
 
 #define EON_ID_EN25Q128		0x3018
 #define EON_ID_EN25Q64		0x3017
+#define EON_ID_EN25S64		0x3817
 
 struct eon_spi_flash_params {
 	u16 id;
@@ -64,6 +65,14 @@
 		.nr_sectors = 2048,
 		.name = "EN25Q64",
 	},
+	{
+		.id = EON_ID_EN25S64,
+		.page_size = 256,
+		.pages_per_sector = 16,
+		.sectors_per_block = 16,
+		.nr_sectors = 2048,
+		.name = "EN25S64",
+	},
 };
 
 static int eon_write(struct spi_flash *flash,