cc3xx/low-level/pka: wait for sw reset to be done before proceeding

nRF52840's CRYPTOCELL implementation of cc310 was dead-locking otherwise on the first PKA operation

Signed-off-by: Mikolai Gütschow <mikolai.guetschow@tu-dresden.de>

Change-Id: Ifdc75aa1d2a0c71c8fbce5917375216388f55f68
1 file changed