msm ipa: fix the routing table starting index

Modem added some more routing tables, so on apps side we
make the routing table starting index larger otherwise app
will override modem's routing tables.

Change-Id: I31a52e56583ff745ea0c579e9e0e65ec82bb6f5b
Acked-by: Shihuan Liu <shihuanl@qti.qualcomm.com>
Signed-off-by: Skylar Chang <chiaweic@codeaurora.org>