gpio: uapi: Improve phrasing around arrays representing empty strings

Character arrays can be considered empty strings (if they are
immediately terminated), but they cannot be NULL.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Jonathan Neuschäfer 2020-03-03 21:01:48 +01:00 • committed by Bartosz Golaszewski
commit 32f5f62d79