PM: AVS: qcom-cpr: Use div64_ul instead of do_div

do_div() does a 64-by-32 division. Here the divisor is an unsigned long
which on some platforms is 64 bit wide. So use div64_ul instead of do_div
to avoid a possible truncation.

Reported-by: Zeal Robot <[email protected]>
Signed-off-by: Changcheng Deng <[email protected]>
Signed-off-by: Bjorn Andersson <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Changcheng Deng

drivers/soc/qcom/cpr.c

@@ -1010,7 +1010,7 @@ static int cpr_interpolate(const struct corner *corner, int step_volt,
 		return corner->uV;
 
 	temp = f_diff * (uV_high - uV_low);
-	do_div(temp, f_high - f_low);
+	temp = div64_ul(temp, f_high - f_low);
 
 	/*
 	 * max_volt_scale has units of uV/MHz while freq values