rsi: rsi_91x_core: Use time_after time comparison

Use time_after kernel macro for time comparison.
Signed-off-by: Karim Eshapa <karim.eshapa@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/rsi/rsi_91x_core.c

@@ -306,7 +306,7 @@ void rsi_core_qos_processor(struct rsi_common *common)
 		tstamp_2 = jiffies;
 		mutex_unlock(&common->tx_rxlock);
 
-		if (tstamp_2 > tstamp_1 + (300 * HZ / 1000))
+		if (time_after(tstamp_2, tstamp_1 + (300 * HZ) / 1000))
 			schedule();
 	}
 }