arm/plat-mxc: Fix forgotten renaming in timer.c

Commit "mxc: Change gpt timer code to be more generic by using V2
instead of MX3" forgot to replace one occurence causing a build
failure.
Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
Cc: Amit Kucheria <amit.kucheria@canonical.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>

arch/arm/plat-mxc/time.c

@@ -102,7 +102,7 @@ static void gpt_irq_acknowledge(void)
 			__raw_writel(MX2_TSTAT_CAPT | MX2_TSTAT_COMP,
 				timer_base + MX1_2_TSTAT);
 	} else if (timer_is_v2())
-		__raw_writel(MX3_TSTAT_OF1, timer_base + MX3_TSTAT);
+		__raw_writel(V2_TSTAT_OF1, timer_base + V2_TSTAT);
 }
 
 static cycle_t mx1_2_get_cycles(struct clocksource *cs)