leds: lp3952: Use 'if (ret)' pattern

Instead of unusual "if (!ret)" use "if (ret)" in lp3952_get_label().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
1 file changed