RTC: PCF85063 support, port to SensorLib 0.3.1 (#8061)

* RTC: PCF85063 support, port to SensorLib 0.3.1

* Tidy up defines

* Remove RTC/PCF8563 mentions from unrelated variants

* Bump SensorLib 0.3.2

* Use SensorRtcHelper

* Consistent warning message

* Fix oversight

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

---------

Co-authored-by: Manuel <71137295+mverch67@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

variants/nrf52840/t-echo/variant.h

@@ -108,8 +108,6 @@ No longer populated on PCB
 
 #define TP_SER_IO (0 + 11)
 
-#define PIN_RTC_INT (0 + 16) // Interrupt from the PCF8563 RTC
-
 /*
 External serial flash WP25R1635FZUIL0
 */
@@ -191,7 +189,9 @@ External serial flash WP25R1635FZUIL0
 #define PIN_SERIAL1_TX GPS_TX_PIN
 
 // PCF8563 RTC Module
+#define PIN_RTC_INT (0 + 16) // Interrupt from the PCF8563 RTC
 #define PCF8563_RTC 0x51
+#define HAS_RTC 1
 
 /*
  * SPI Interfaces
@@ -219,8 +219,6 @@ External serial flash WP25R1635FZUIL0
 
 // #define NO_EXT_GPIO 1
 
-#define HAS_RTC 1
-
 #ifdef __cplusplus
 }
 #endif