Enable RTC I2C interrupt
| SLAVE_TRAN_COMP_INT_ENA | RTC_I2C_SLAVE_TRAN_COMP_INT interrupt enable bit |
| ARBITRATION_LOST_INT_ENA | RTC_I2C_ARBITRATION_LOST_INT interrupt enable bit |
| MASTER_TRAN_COMP_INT_ENA | RTC_I2C_MASTER_TRAN_COMP_INT interrupt enable bit |
| TRANS_COMPLETE_INT_ENA | RTC_I2C_TRANS_COMPLETE_INT interrupt enable bit |
| TIME_OUT_INT_ENA | RTC_I2C_TIME_OUT_INT interrupt enable bit |
| ACK_ERR_INT_ENA | RTC_I2C_ACK_ERR_INT interrupt enable bit |
| RX_DATA_INT_ENA | RTC_I2C_RX_DATA_INT interrupt enable bit |
| TX_DATA_INT_ENA | RTC_I2C_TX_DATA_INT interrupt enable bit |
| DETECT_START_INT_ENA | RTC_I2C_DETECT_START_INT interrupt enable bit |