octeontx2-af: restore rxc conf after teardown sequence

commit 1b2b5052f7b8b77792ef2fc7c3c07e8743cb6732 from
git@git.assembla.com:cavium/WindRiver.linux.git

Restore rxc timeout and threshold config after teardown
sequence is complete as it is global config and not
per CPT LF.

Change-Id: I6b7a7149d5f8ce9db44c1b339a655523cdf3cfd0
Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/63569


Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>