Update MPSL and SoftDevice Controller#1870

NordicBuilder wants to merge 2 commits intonrfconnect:v2.6.4-NCSDK-34113-branchnrfconnect/sdk-nrfxlib:v2.6.4-NCSDK-34113-branchfrom

NordicBuilder:update-ble-controller-and-mpsl-202510031042NordicBuilder/sdk-nrfxlib:update-ble-controller-and-mpsl-202510031042Copy head branch name to clipboard