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If line has been locked as IRQ without requesting,
still check its label and return it, if not NULL.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240530191418.1138003-2-andriy.shevchenko@linux.intel.com

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>