net/bnxt: increase flow scale for Thor

net/bnxt: increase flow scale for Thor

* Updated defines and data types to allow 256 VFRs.
* Increased the encap record cache to support 256 to 4K entries. So
  VxLAN connections can be scaled to 4K entries.

Signed-off-by: Shahaji Bhosle <sbhosle@broadcom.com>
Signed-off-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>