msm: vidc: Use sid to create instance debugfs directory

Currently, instance pointer value is used to create an instance debugfs
name. Using instance pointer causes multiple instances to have the same
debugfs name when kptr restriction is applied. Use instance sid instead
of pointer value to create a unique debugfs name during concurrencies.
Also, use %pK instead of %p in other places.

Change-Id: I098f641e9a548bcb8bf6d939422607cdc194adb3
Signed-off-by: Mihir Ganu <mganu@codeaurora.org>
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>