Merge pull request #3454 from 0xc0170/jeromecoutant-PR_LPT

STM32: Refactor lp_ticker.c + rtc_api.c + sleep.c + rtc_api_hal.h files

Author: 0xc0170

targets/TARGET_STM/TARGET_STM32F0/common_objects.h

@@ -116,4 +116,8 @@ struct i2c_s {
 }
 #endif
 
+/* STM32F0 HAL doesn't provide this API called in rtc_api.c */
+#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
+#define RTC_WKUP_IRQn RTC_IRQn
+
 #endif

targets/TARGET_STM/TARGET_STM32F0/rtc_api.c

@@ -116,5 +116,8 @@ struct i2c_s {
 }
 #endif
 
+/* STM32F1 HAL doesn't provide this API called in rtc_api.c */
+#define __HAL_RCC_RTC_CLKPRESCALER(__RTCCLKSource__)
+
 #endif