Adding setup and destroy routines for chip-context. The chip context would
be used frequently in control and data path to take execution flow
depending on the chip type.  chip context structure pointer is added to
the relevant data structures.
Signed-off-by: NSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: NDevesh Sharma <devesh.sharma@broadcom.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>