i2c-piix4: Modify code name SB900 to Hudson-2

Change SB900 to its formal code name Hudson-2.

Signed-off-by: Crane Cai <crane.cai@amd.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 737335f..e8fe7f1 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -128,7 +128,7 @@
 	    ATI SB600
 	    ATI SB700
 	    ATI SB800
-	    AMD SB900
+	    AMD Hudson-2
 	    Serverworks OSB4
 	    Serverworks CSB5
 	    Serverworks CSB6