i2c-eg20t: Support new device LAPIS Semiconductor ML7831 IOH

ML7831 is companion chip for Intel Atom E6xx series.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.lapis-semi.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/i2c/busses/i2c-eg20t.c b/drivers/i2c/busses/i2c-eg20t.c
index 357a66c..c72d7f9 100644
--- a/drivers/i2c/busses/i2c-eg20t.c
+++ b/drivers/i2c/busses/i2c-eg20t.c
@@ -137,6 +137,7 @@
 Set the number of I2C instance max
 Intel EG20T PCH :		1ch
 OKI SEMICONDUCTOR ML7213 IOH :	2ch
+OKI SEMICONDUCTOR ML7831 IOH :	1ch
 */
 #define PCH_I2C_MAX_DEV			2
 
@@ -184,11 +185,13 @@
 #define PCI_VENDOR_ID_ROHM		0x10DB
 #define PCI_DEVICE_ID_ML7213_I2C	0x802D
 #define PCI_DEVICE_ID_ML7223_I2C	0x8010
+#define PCI_DEVICE_ID_ML7831_I2C	0x8817
 
 static DEFINE_PCI_DEVICE_TABLE(pch_pcidev_id) = {
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_PCH_I2C),   1, },
 	{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7213_I2C), 2, },
 	{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7223_I2C), 1, },
+	{ PCI_VDEVICE(ROHM, PCI_DEVICE_ID_ML7831_I2C), 1, },
 	{0,}
 };