By making use of the restart_handler chain mechanism, the SLCR-based
reset mechanism can be prioritized amongst other mechanisms available on
a particular board.

Choose a default high-ish priority of 192 for this restart mechanism.
Signed-off-by: NJosh Cartwright <joshc@ni.com>
Signed-off-by: NMichal Simek <michal.simek@xilinx.com>