cpufreq: sun50i: fix error returns in dt_has_supported_hw()

The dt_has_supported_hw() function returns type bool.  That means these
negative error codes are cast to true but the function should return
false instead.

Fixes: fa5aec9 ("cpufreq: sun50i: Add support for opp_supported_hw")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Author: Dan Carpenter

drivers/cpufreq/sun50i-cpufreq-nvmem.c

@@ -136,11 +136,11 @@ static bool dt_has_supported_hw(void)
 
 	cpu_dev = get_cpu_device(0);
 	if (!cpu_dev)
-		return -ENODEV;
+		return false;
 
 	np = dev_pm_opp_of_get_opp_desc_node(cpu_dev);
 	if (!np)
-		return -ENOENT;
+		return false;
 
 	for_each_child_of_node(np, opp) {
 		if (of_find_property(opp, "opp-supported-hw", NULL)) {