clk: stm32: stm32-core: convert from divider_ro_round_rate() to divider_ro_determine_rate()

The divider_ro_round_rate() function is now deprecated, so let's migrate
to divider_ro_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: cd1cb38 ("clk: stm32: stm32-core: convert from round_rate() to determine_rate()")
Signed-off-by: Brian Masney <bmasney@redhat.com>

Author: masneyb

drivers/clk/stm32/clk-stm32-core.c

@@ -369,13 +369,10 @@ static int clk_stm32_divider_determine_rate(struct clk_hw *hw,
 		val =  readl(div->base + divider->offset) >> divider->shift;
 		val &= clk_div_mask(divider->width);
 
-		req->rate = divider_ro_round_rate(hw, req->rate,
-						  &req->best_parent_rate,
-						  divider->table,
-						  divider->width,
-						  divider->flags, val);
-
-		return 0;
+		return divider_ro_determine_rate(hw, req,
+						 divider->table,
+						 divider->width,
+						 divider->flags, val);
 	}
 
 	req->rate = divider_round_rate_parent(hw, clk_hw_get_parent(hw),
@@ -455,14 +452,9 @@ static int clk_stm32_composite_determine_rate(struct clk_hw *hw,
 		val =  readl(composite->base + divider->offset) >> divider->shift;
 		val &= clk_div_mask(divider->width);
 
-		rate = divider_ro_round_rate(hw, req->rate, &req->best_parent_rate,
-					     divider->table, divider->width, divider->flags,
-					     val);
-		if (rate < 0)
-			return rate;
-
-		req->rate = rate;
-		return 0;
+		return divider_ro_determine_rate(hw, req, divider->table,
+						 divider->width, divider->flags,
+						 val);
 	}
 
 	rate = divider_round_rate_parent(hw, clk_hw_get_parent(hw),