msm:ipa3: fix the header table gap issue

Move those deleted entries to the free
list to avoid the gap in hdr tbl list.

Change-Id: I5f5b6ec845e6b7e52c7079c2a3200a8290616951
Acked-by: Pooja Kumari <kumarip@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>