bnxt_en: Share the bar0 address with the RoCE driver

Add a parameter in the bnxt_en_dev structure to share the bar0 address
with RoCE driver.

Link: https://lore.kernel.org/r/1689742977-9128-3-git-send-email-selvin.xavier@broadcom.com


CC: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Chandramohan Akula <chandramohan.akula@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>