octeontx2-af: limit KPU parsing for GTPU only to GTPv1

commit 6bc6ddd789f8cc0eb6ebba332688e1cf4e6fd09f from
git@git.assembla.com:cavium/WindRiver.linux.git

While parsing GTPU, all GTP types like GTPv1, GTPv2 and GTP' has been
extracted as single generic ltype as NPC_LT_LE_GTPU. This will create
a problem when matching needs to be performed only for specific versions.
This patch limit the KPU parsing for GTPU only to GTPv1. Other GTP types
like GTPv2 and GTP' won't be parsed as GTPU. If KPU parsing support is
required for GTPv2 or GTP' then different ltypes has to be added.

Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
Change-Id: I08f12e57dafa702225af8bb09d2f026666c963ad
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/39381


Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <Sunil.Goutham@cavium.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>