irda: Removed all unused timeval variables

In the file au1k_ir.c & via-ircc.h, there were two unused definitions of the
timeval type members, this commit therefore removes this unneeded code.

In other three files, the same problem is the rx_time member is only ever
written, never read, so removed it entirely.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/via-ircc.h

@@ -29,7 +29,6 @@ this program; if not, see <http://www.gnu.org/licenses/>.
  ********************************************************************/
 #ifndef via_IRCC_H
 #define via_IRCC_H
-#include <linux/time.h>
 #include <linux/spinlock.h>
 #include <linux/pm.h>
 #include <linux/types.h>
@@ -106,9 +105,6 @@ struct via_ircc_cb {
 
 	__u8 ier;		/* Interrupt enable register */
 
-	struct timeval stamp;
-	struct timeval now;
-
 	spinlock_t lock;	/* For serializing operations */
 
 	__u32 flags;		/* Interface flags */