Back out last RTC alarm changes. I am mistaken, the interrupts are enabled by stm32[l4]_exti_alarm().

arch/arm/src/stm32/stm32f40xxx_rtcc.c

@@ -1026,10 +1026,6 @@ int up_rtc_initialize(void)
 
   stm32_exti_alarm(true, false, true, stm32_rtc_alarm_handler);
   rtc_dumpregs("After InitExtiAlarm");
-
-  /* Enable RTC Alarm interrupts */
-
-  up_enable_irq(STM32_IRQ_RTCALRM);
 #else
   rtc_dumpregs("After Initialization");
 #endif

arch/arm/src/stm32l4/stm32l4_rtcc.c

@@ -963,10 +963,6 @@ int up_rtc_initialize(void)
    */
 
   stm32l4_exti_alarm(true, false, true, stm32l4_rtc_alarm_handler);
-
-  /* Enable RTC Alarm interrupts */
-
-  up_enable_irq(STM32L4_IRQ_RTCALRM);
 #endif
 
   g_rtc_enabled = true;