msm: ipa: add header type to debugfs

Print header L2 type as part of printing header
table in debugfs.

Change-Id: I38ce867310356eb126a1438bf148acb39c1fe35f
Acked-by: Ady Abraham <adya@qti.qualcomm.com>
Signed-off-by: Ravit Katzav <rkatzav@codeaurora.org>