SAADC EVENT_CH[n].LIMITH and L doesn't work for channel 4 .. 7

[schumphi]

The interrupt for all limit events are set correct but when a high or low event for channel 4 to 7 is triggered then the event is not processed. The reason is a wrong mask macro

/** @brief Symbol specifying the interrupt bitmask for limits of all channels. */
#define NRF_SAADC_ALL_CHANNELS_LIMITS_INT_MASK \
    ((uint32_t)(((1 << SAADC_CH_NUM) - 1) << NRF_SAADC_LIMITS_INT_OFFSET))

There are 2 events per channel so change macro

/** @brief Symbol specifying the interrupt bitmask for limits of all channels. */
#define NRF_SAADC_ALL_CHANNELS_LIMITS_INT_MASK \
    ((uint32_t)(((1 << SAADC_CH_NUM * 2) - 1) << NRF_SAADC_LIMITS_INT_OFFSET))