timer: Return count from timer_ops.get_count

No timer drivers return an error from get_count. Instead of possibly
returning an error, just return the count directly.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/timer/atcpit100_timer.c b/drivers/timer/atcpit100_timer.c
index 5d4ae68..fcb8a45 100644
--- a/drivers/timer/atcpit100_timer.c
+++ b/drivers/timer/atcpit100_timer.c
@@ -68,13 +68,12 @@
 	u32 *regs;
 };
 
-static int atcpit_timer_get_count(struct udevice *dev, u64 *count)
+static u64 atcpit_timer_get_count(struct udevice *dev)
 {
 	struct atcpit_timer_platdata *plat = dev_get_platdata(dev);
 	u32 val;
 	val = ~(REG32_TMR(CH_CNT(1))+0xffffffff);
-	*count = timer_conv_64(val);
-	return 0;
+	return timer_conv_64(val);
 }
 
 static int atcpit_timer_probe(struct udevice *dev)