USB: c67x00-ll-hpi.c: signedness bug in ll_recv_msg()

The callers expect this function to return zero on success or -EIO if it
times out.  The type should be int instead of unsigned short.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/c67x00/c67x00-ll-hpi.c

@@ -237,7 +237,7 @@ void c67x00_ll_hpi_disable_sofeop(struct c67x00_sie *sie)
 /* -------------------------------------------------------------------------- */
 /* Transactions */
 
-static inline u16 ll_recv_msg(struct c67x00_device *dev)
+static inline int ll_recv_msg(struct c67x00_device *dev)
 {
 	u16 res;