ath10k: Move logging prior to ath10k core destroy

ath10k core destroy frees the debug references and
this is leading to crash when ATH10K_DBG_SNOC mask is
defined.

Fix this by moving logs to prior ath10k core destroy.

Change-Id: If4fd96fdfd9faaf19480b6d523c501747f56d40e
Signed-off-by: Govind Singh <govinds@codeaurora.org>