clk: sprd: div: convert from divider_round_rate() to divider_determine_rate()

The divider_round_rate() function is now deprecated, so let's migrate
to divider_determine_rate() instead so that this deprecated API can be
removed.

Note that when the main function itself was migrated to use
determine_rate, this was mistakenly converted to:

    req->rate = divider_round_rate(...)

This is invalid in the case when an error occurs since it can set the
rate to a negative value.

Fixes: deb4740 ("clk: sprd: div: convert from round_rate() to determine_rate()")
Signed-off-by: Brian Masney <bmasney@redhat.com>

Author: masneyb

drivers/clk/sprd/div.c

@@ -14,11 +14,7 @@ static int sprd_div_determine_rate(struct clk_hw *hw,
 {
 	struct sprd_div *cd = hw_to_sprd_div(hw);
 
-	req->rate = divider_round_rate(&cd->common.hw, req->rate,
-				       &req->best_parent_rate,
-				       NULL, cd->div.width, 0);
-
-	return 0;
+	return divider_determine_rate(&cd->common.hw, req, NULL, cd->div.width, 0);
 }
 
 unsigned long sprd_div_helper_recalc_rate(struct sprd_clk_common *common,