ColdFire: Fix incorrect define for mcf5227x and mcf5445x RTC

Rename CONFIG_MCFTMR to CONFIG_MCFRTC to include real time
clock module in cpu/<cf arch>/cpu_init.c
Signed-off-by: NTsiChung Liew <Tsi-Chung.Liew@freescale.com>

cpu/mcf5227x/cpu_init.c

@@ -106,7 +106,7 @@ void cpu_init_f(void)
  */
 int cpu_init_r(void)
 {
-#ifdef CONFIG_MCFTMR
+#ifdef CONFIG_MCFRTC
 	volatile rtc_t *rtc = (volatile rtc_t *)(CFG_MCFRTC_BASE);
 	volatile rtcex_t *rtcex = (volatile rtcex_t *)&rtc->extended;
 	u32 oscillator = CFG_RTC_OSCILLATOR;

cpu/mcf5445x/cpu_init.c

@@ -110,7 +110,7 @@ void cpu_init_f(void)
  */
 int cpu_init_r(void)
 {
-#ifdef CONFIG_MCFTMR
+#ifdef CONFIG_MCFRTC
 	volatile rtc_t *rtc = (volatile rtc_t *)(CFG_MCFRTC_BASE);
 	volatile rtcex_t *rtcex = (volatile rtcex_t *)&rtc->extended;