pwm/dw: Make config_info pointers const.

Mutable driver state relocated from config_info to driver_info.

This driver is unused by any board, nor can it be compiled for any
board.  Hence this patch reflects the mechanical change that should be
made to the driver in order to support a const config_info, but the
patch has been neither compiled, nor tested.

Change-Id: I28597962e81d6e02f1f4befe48c3a3324691cfeb
Signed-off-by: Marcus Shawcroft <marcus.shawcroft@arm.com>
1 file changed