staging: ced1401: fix sparse warning for ced1401

This patch fixes below warning.

drivers/staging/ced1401/ced_ioc.c:703:30: warning: incorrect type in assignment (different address spaces)
drivers/staging/ced1401/ced_ioc.c:703:30:    expected void *[usertype] lpvBuff
drivers/staging/ced1401/ced_ioc.c:703:30:    got char [noderef] <asn:1>*puBuf
Signed-off-by: Seunghun Lee <waydi1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/ced1401/usb1401.h

@@ -101,7 +101,7 @@ typedef struct circBlk {
 /*  A structure holding all of the information about a transfer area - an area of */
 /*   memory set up for use either as a source or destination in DMA transfers. */
 typedef struct transarea {
-	void	*lpvBuff;                /*  User address of xfer area saved for completeness */
+	void __user *lpvBuff;                /*  User address of xfer area saved for completeness */
 	UINT        dwBaseOffset;           /*  offset to start of xfer area in first page */
 	UINT        dwLength;               /*  Length of xfer area, in bytes */
 	struct page **pPages;               /*  Points at array of locked down pages */