i2c: convert i2c-isch to platform_device

Convert i2c-isch to platform_device for the lpc mfd core to add it at probe
time.

Signed-off-by: Denis Turischev <denis@compulab.co.il>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 4cc3807..f22eff1 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -105,7 +105,7 @@
 
 config I2C_ISCH
 	tristate "Intel SCH SMBus 1.0"
-	depends on PCI
+	select LPC_SCH
 	help
 	  Say Y here if you want to use SMBus controller on the Intel SCH
 	  based systems.