bluetooth: controller: hal: Correct the bit mask of used PPI channels

This is a follow up to commit 0eaa5e53a36af498115b4e56b1ea68cc89fc29ee.

`HAL_SW_SWITCH_RADIO_ENABLE_S2_PPI_BASE` is a base number for two PPI
channels, so two bits need to be marked in the used channel bit mask.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
1 file changed