Chelsio driver loads firmware configuration file to allow

Chelsio driver loads firmware configuration file to allow
firmware to distribute resources before chip bring up. Chelsio NIC
driver, cxgb4 searches for firmware config file at /lib/firmware/cxgb4/
directory.

Two predefined configuration files are available – default and
hashfilter. Default configuration file equally distributes
resources across all features, such as iSCSI, iWARP, Crypto, etc.
On the other hand, hashfilter configuration file borrows some
resources by disabling the iSCSI, iWARP, Crypto, etc. features,
and redistributes them to increase offloading more number of flows
to hardware via tc-flower.

Signed-off-by: Vishal Kulkarni <vishal@chelsio.com>