soc: octeontx2: Add driver support for Cache Controller Unit

commit 0e29503f6b58995eec1d9210dd8d19c6d6b7801b from
git@git.assembla.com:cavium/WindRiver.linux.git

- Added new platform driver for CCU
- API support for CCU/CCS register access
- Low level APIs for cache partitioning
- Debugfs hooks for using the cache partitioning APIs

Change-Id: I34b3887cf0b711bb82fb0850105fd57de3057682
Signed-off-by: Linu Cherian <lcherian@marvell.com>
Signed-off-by: Tanmay Jagdale <tanmay@marvell.com>
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/kernel/linux/+/67900
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Sunil Kovvuri Goutham <sgoutham@marvell.com>
Signed-off-by: Ruiqiang Hao <Ruiqiang.Hao@windriver.com>