Destination buffer already has offset added. So, don't add offset
again.
Fetch actual size of configured OBQ from hardware, instead of using
hardcoded value.
Fixes: 7c075ce221cf ("cxgb4: collect IBQ and OBQ dumps")
Signed-off-by: Rahul Lakkireddy <redacted>
Signed-off-by: Ganesh Goudar <redacted>