clk: sunxi-ng: convert from divider_round_rate_parent() to divider_determine_rate()

clk: sunxi-ng: convert from divider_round_rate_parent() to divider_determine_rate()

The divider_round_rate_parent() function is now deprecated, so let's
migrate to divider_determine_rate() instead so that this deprecated API
can be removed. Also go ahead and convert all of the driver from round
rate type to determine rate that accepts a 'struct clk_rate_request' to
simplify the overall driver code.

Acked-by: Chen-Yu Tsai <wens@kernel.org>
Signed-off-by: Brian Masney <bmasney@redhat.com>