The production version of the nRF54L15 SoC is now available, so remove
the initial Engineering A (EngA) preview version.
Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
Add a mailbox driver for VEVIF events (VPR irq).
The driver can be built in either 'rx' or 'tx' configuration.
The VPR sends the event, so it uses the 'tx' configuration,
while the master core uses the 'rx' configuration of the driver
to receive the VPR events.
Signed-off-by: Jakub Zymelka <jakub.zymelka@nordicsemi.no>