header: types.h: add __poll_t

__poll_t was added for kernel 4.15 in commit 8ced390c2b ("define
__poll_t, annotate constants"), add it here for older kernel versions.
Multiple drivers are using this type.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
1 file changed