atmel: remove time_t usage

last_qual never really holds a time. It only holds jiffies. Make it the
same type as jiffies.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/atmel/atmel.c

@@ -513,7 +513,7 @@ struct atmel_private {
 	} station_state;
 
 	int operating_mode, power_mode;
-	time_t last_qual;
+	unsigned long last_qual;
 	int beacons_this_sec;
 	int channel;
 	int reg_domain, config_reg_domain;