Thomas Haller authored May 01, 2019 and Lubomir Rintel committed May 15, 2019

"NM_CMP_FIELD (a, b, fq_codel.ecn == TRUE)" is quite a hack as it relies on
the implementation of the macro in a particular way. The problem is, that
NM_CMP_FIELD() uses typeof() which cannot be used with bitfields. So, the
nicer solution is to use NM_CMP_FIELD_UNSAFE() which exists exactly for bitfields
(it's "unsafe", because it evaluates arguments more than once as it avoids
the temporary variable with typeof()).

Same with nm_hash_update_vals() which uses typeof() to avoid evaluating
arguments more than once. But that again does not work with bitfields.
The "proper" way is to use NM_HASH_COMBINE_BOOLS().

(cherry picked from commit 47d8bee1)