usb-serial: Use ftdi_sio driver for RATOC REX-USB60F

This patch reverts 57833ea6b95a3995149f1f6d1a8d8862ab7a0ba2
("usb-serial: pl2303: add support for RATOC REX-USB60F") and adds
support for the device to ftdi_sio driver.

Cc: Akira Tsukamoto <akirat@rd.scei.sony.co.jp>
Cc: stable <stable@kernel.org>
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 504edf8..a72f2c8 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -592,6 +592,12 @@
 #define	FIC_NEO1973_DEBUG_PID	0x5118
 
 /*
+ * RATOC REX-USB60F
+ */
+#define RATOC_VENDOR_ID		0x0584
+#define RATOC_PRODUCT_ID_USB60F	0xb020
+
+/*
  *   BmRequestType:  1100 0000b
  *   bRequest:       FTDI_E2_READ
  *   wValue:         0