mlx4: correct error reporting in mlx4_master_process_vhcr()

mlx4: correct error reporting in mlx4_master_process_vhcr()

mlx4_master_process_vhcr() logs vhcr->errno on failures, but this field
is never populated by the PF path. As a result, all failures are reported
with errno 0 and err print in status case which is misleading.

Use the actual return value (err) instead, translate it to FW status
before logging, and report both values.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260409092754.508880-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>