enable RTC for all STM32 devices

Author: m-mcgowan

ports/stm/mpconfigport.mk

@@ -24,7 +24,7 @@ ifeq ($(MCU_SERIES),F4)
         CIRCUITPY_I2CPERIPHERAL ?= 0
         CIRCUITPY_NVM ?= 0
         CIRCUITPY_ROTARYIO ?= 0
-        CIRCUITPY_RTC ?= 0
+        CIRCUITPY_RTC ?= 1
         USB_NUM_ENDPOINT_PAIRS = 4
         UF2_FAMILY_ID ?= 0x57755a57
 endif
@@ -42,7 +42,7 @@ ifeq ($(MCU_SERIES),H7)
         CIRCUITPY_PULSEIO ?= 0
         CIRCUITPY_PWMIO ?= 0
         CIRCUITPY_ROTARYIO ?= 0
-        CIRCUITPY_RTC ?= 0
+        CIRCUITPY_RTC ?= 1
 
         USB_NUM_ENDPOINT_PAIRS = 9
         UF2_FAMILY_ID ?= 0x6db66082
@@ -59,7 +59,7 @@ ifeq ($(MCU_SERIES),F7)
         CIRCUITPY_NEOPIXEL_WRITE ?= 0
         CIRCUITPY_NVM ?= 0
         CIRCUITPY_ROTARYIO ?= 0
-        CIRCUITPY_RTC ?= 0
+        CIRCUITPY_RTC ?= 1
 
         USB_NUM_ENDPOINT_PAIRS = 6
         UF2_FAMILY_ID ?= 0x53b80f00
@@ -76,7 +76,7 @@ ifeq ($(MCU_SERIES),L4)
         CIRCUITPY_NEOPIXEL_WRITE ?= 0
         CIRCUITPY_NVM ?= 0
         CIRCUITPY_ROTARYIO ?= 0
-        CIRCUITPY_RTC ?= 0
+        CIRCUITPY_RTC ?= 1
         # todo - this varies between devices in the series
         # This slide deck https://www.st.com/content/ccc/resource/training/technical/product_training/98/89/c8/6c/3e/e9/49/79/STM32L4_Peripheral_USB.pdf/files/STM32L4_Peripheral_USB.pdf/jcr:content/translations/en.STM32L4_Peripheral_USB.pdf
         # cites 16 endpoints, 8 endpoint pairs, while section 3.39 of the L4R5 datasheet states 6 endpoint pairs.