msm: ipa3: Changes to keep IPA clock voted in panic notifier

Adding changes to avoid unclocked access in panic notifier.
Increasing the IPA clock vote before saving the IPA registers.

Change-Id: Ie055ffa844df45b8a65603190495bc2d1cc3f84a
Signed-off-by: Ashok Vuyyuru <avuyyuru@codeaurora.org>