ARM: S3C: Rename s3c_device_usb to s3c_device_ohci

Prepare for the forthcoming device changes by renaming s3c_device_usb to
s3c_device_ohci as this is what the device represents.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-samsung/dev-usb.c b/arch/arm/plat-samsung/dev-usb.c
index 2ee85ab..431ae5d 100644
--- a/arch/arm/plat-samsung/dev-usb.c
+++ b/arch/arm/plat-samsung/dev-usb.c
@@ -36,7 +36,7 @@
 
 static u64 s3c_device_usb_dmamask = 0xffffffffUL;
 
-struct platform_device s3c_device_usb = {
+struct platform_device s3c_device_ohci = {
 	.name		  = "s3c2410-ohci",
 	.id		  = -1,
 	.num_resources	  = ARRAY_SIZE(s3c_usb_resource),
@@ -47,4 +47,4 @@
 	}
 };
 
-EXPORT_SYMBOL(s3c_device_usb);
+EXPORT_SYMBOL(s3c_device_ohci);