eeepc-laptop: store_cpufv: return error if set_acpi fails

The result of set_acpi is left unchecked, but it may return errors. If
one occurs, send the error to the caller. There's no reason to lie about
it, if set_acpi fails.
Signed-off-by: Frans Klaver <fransklaver@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/eeepc-laptop.c

@@ -388,7 +388,9 @@ static ssize_t cpufv_store(struct device *dev,
 		return rv;
 	if (value < 0 || value >= c.num)
 		return -EINVAL;
-	set_acpi(eeepc, CM_ASL_CPUFV, value);
+	rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
+	if (rv)
+		return rv;
 	return count;
 }