[ARM] S3C: Add i2c1 device definition

Add device definition and support functions for the
second i2c device (i2c1). If this is selected, the first
i2c bus will become index 0 instead of index -1.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index e6e6496..d7a6e48 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -160,3 +160,9 @@
 	depends on PLAT_S3C
 	help
 	  Compile in platform device definitions for HSMMC channel 1
+
+config S3C_DEV_I2C1
+	bool
+	depends on PLAT_S3C
+	help
+	  Compile in platform device definitions for I2C channel 1