Update sysfs pwm dir

[pjueon]

Update sysfs pwm dir for kernel 5.15. See: NVIDIA/jetson-gpio@e9f417a

Note

The variable sysfs_prefixes is also used here:

JetsonGPIO/src/GPIOPinData.cpp

Lines 690 to 698 in a8b0d53

	for (const auto& prefix : sysfs_prefixes)
	{
	auto d = prefix + gpio_chip_name;
	if (os_path_isdir(d))
	{
	gpio_chip_dir = d;
	break;
	}
	}

Should check if this change should also be applied to this part or not.