msm: ipa3: Fix to avoid buffer overread

additional check to make sure there is no buffer overread.

Change-Id: I9bf66522f6a3da7c7185f387567d6773ae402b76
Acked-by: Suhas Mallesh <smallesh@qti.qualcomm.com>
Signed-off-by: Michael Adisumarta <madisuma@codeaurora.org>