[ARM] 3643/1: S3C2410: Add new usb clocks

Patch from Ben Dooks

Make the S3C2410 use the same usb clock naming
as the S3C2412

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>