qcacld-3.0: Fix invalid session used in ap ecsa timeout api

If ecsa timeout is active and stop bss is received. During
pe delete session the timer is stopped and destroyed. But if
if timer has already expired and has posted the message to MC
thread the timer callback will be called with pe session which
is already deleted.

Fix this by checking if of pe session is valid in timeout API.
Also reset dfsIncludeChanSwIe during pe delete session.

Change-Id: I67d7e65c8136daaa04afa8b01b7019b0b8b36dae
CRs-Fixed: 2372278
2 files changed