iio: light: tsl2563: Configure INT in one place

Introduce tsl2563_configure_irq() to configure INT in one place.

While at it, make use of TSL2563_INT_LEVEL and newly introduced
TSL2563_INT_MASK.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Ferry Toth <ftoth@exalondelft.nl>
Link: https://lore.kernel.org/r/20221207190348.9347-3-andriy.shevchenko@linux.intel.com


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>