soc: qcom: glink_ssr: Use do_cleanup_data from pkt_priv

do_cleanup_data pointer is created for every SSR notification and
stored in cb_data. It is possible that the stored pointer can be
overwritten if two peripherals SSR happens at the same time.

Use do_cleanup_data pointer directly in pkt_priv, instead of
dereferencing from cb_data.

CRs-Fixed: 2121529
Change-Id: Ife68cdc460c0628623dea6827632b8acd8d1d955
Signed-off-by: Dhoat Harpal <hdhoat@codeaurora.org>