bnxt_en: Add pcie_ctx_v2 support for ethtool -d

Add support to dump the expanded v2 struct that contains PCIE read/write
latency and credit histogram data.

Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Shruti Parab <shruti.parab@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250819163919.104075-5-michael.chan@broadcom.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>