Synchronize the ath11k backports with the current ath-next tree.
This backports several memory leak issues, PCI IRQ fixup, peer add locking
fix as well as IPQ5018 support, though IPQ5018 support is unused for now.
This allows to easily backport further fixes as cherry picking them has
started requiring manual conflict resolution.
Signed-off-by: Robert Marko <robimarko@gmail.com>
