rockchip: timer: update for 32/64bit-aware OF_PLATDATA

rockchip: timer: update for 32/64bit-aware OF_PLATDATA

With dtoc emitting fdt64_t for addresses (and region sizes), the array
indices for accessing the reg[] array needs to be adjusted.  This
adjusts the Rockchip DM timer driver to correctly handle OF_PLATDATA
given this new structure layout.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>