drivers: hci: stm32wb: LSI is not an allowed clock for BLE RF.
Remove code related to LSI used as clock source for RF wakeup,
it isn't a valid clock source.
Also don't disable LSI when LSE is selected.
@@ -405,17 +405,6 @@ static void start_ble_rf(void)
/* Select wakeup source of BLE RF */
LL_RCC_SetRFWKPClockSource(LL_RCC_RFWKP_CLKSOURCE_LSE);
-
- /* Switch OFF LSI */
- LL_RCC_LSI2_Disable();
-#else
- LL_RCC_LSI2_Enable();
- while (!LL_RCC_LSI2_IsReady()) {
- }
-
- /* Select wakeup source of BLE RF */
- LL_RCC_SetRFWKPClockSource(LL_RCC_RFWKP_CLKSOURCE_LSI);
- LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSI);
#endif
/* HSI48 clock and CLK48 clock source are enabled using the device tree */
