octeontx2-pf: Fix for ping among LBK pairs.

commit eb13c2aa0d271dab94d064a0d6939ac6c6247395 from
git@git.assembla.com:cavium/WindRiver.linux.git

NPA aura backpressure in aura context is not properly set for NIX1 RX
interface. Because of this, ping among LBK pairs is not working in 98xx.
This patch fixes this.

Fixes: 93d956c82303 ("octeontx2-pf: Set NIX1_RX interface for backpressure")
Change-Id: I408519711f848fc16658e5c58ab76c303cc2b319
Signed-off-by: Rakesh Babu <rsaladi2@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/48642


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>