QCanBusFrame: use Q_FLAG instead of Q_FLAGS + Q_ENUM


This enum is declared as a QFlags (with Q_DECLARE_FLAGS(Es, E)), using
Q_FLAG(Es) will register each enum value with the meta-object system.

Q_FLAGS has been deprecated since at least Qt 6.

Pick-to: 6.11 6.10 6.8 6.5
Change-Id: If81e287611f17b5f0035380c163a5e5c09b14523
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>
commitd772275d278a333486d87e8046444bc21afe6cd0
parentc1202eb07bf5c0968c55eedf3dcb551d6330bf80
authorAhmad Samir <a.samirh78@gmail.com>
committerAhmad Samir <a.samirh78@gmail.com>
commit timeMon, 8 Dec 2025 21:28:31 +0000