hw/mcu/dialog: Remove redundant PDC ack in CMAC driver
hw/mcu/dialog: Remove redundant PDC ack in CMAC driver

There is no need to do this, it will be acked before going to deep
sleep (where all M33 PDC entries are acked).

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core