net/bnxt: check FW capability to support TRUFLOW

net/bnxt: check FW capability to support TRUFLOW

Currently, a devarg (host-based-truflow) is passed while launching
the app to enable TRUFLOW feature. However, this mechanism adds
an extra step in enabling TRUFLOW. This doesn't give a seamless
experience when flow offloads has to work with FW that doesn't/does
support TRUFLOW feature. Also, it's likely that customers may not
want to use devarg to enable flow offloads.

This patch fixes it by checking for TRUFLOW feature support in
device's capabilities and configurations field of the hwrm_ver_get.

Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>