[ARM] S3C: Add common USB OHCI device definition

Add common definition for USB OHCI platform device, add a Kconfig
to selectively compile it and add update all the users.

Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index de93838..042d34a 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -172,4 +172,9 @@
 	help
 	  Compile in platform device definition for framebuffer
 
+config S3C_DEV_USB_HOST
+	bool
+	help
+	  Compile in platform device definition for USB host.
+
 endif