msm: ipa3: fix to remove mutex lock in panic notifier

Panic notifier is called in atomic context. In the same
context trying to acquire mutex lock but the lock is
already taken in the another thread. It will cause
excessive warnings logs in dmesg. To avoid this
scenario add changes to remove mutex lock from
panic notifier function.

Change-Id: I299d445751f4bc0913f0316d1f8f6ac73a553dbf
Acked-by: Ashok Vuyyuru <avuyyuru@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>