mtp-responder: Update comment / sync from stable branch

[JianyuWang0623]

Summary

1. Update comment / sync from stable branch
2. Move mtp_port.c and mtp_usb_driver_nuttx.c back to external - external/MTP: Pick commits of mtp_usb_driver_nuttx.c and mtp_port.c from mtp-responder/src external#12

Impact

MTP

Testing

CI

[JianyuWang0623]

Check

$ git fetch gerrit
$ git fetch openvela

$ git log gerrit/****-******-4.0  --pretty=format:"%h %s" | while read commit; do commit_id=$(echo $commit | awk '{print $1}'); commit_msg=$(echo $commit | cut -d" " -f2-); echo "Commit Message: $commit_msg"; done | sort -u > /tmp/sync_mtp_4_0

$ git log gerrit/****-******-3.5  --pretty=format:"%h %s" | while read commit; do commit_id=$(echo $commit | awk '{print $1}'); commit_msg=$(echo $commit | cut -d" " -f2-); echo "Commit Message: $commit_msg"; done | sort -u > /tmp/sync_mtp_3_5

$ git log openvela/dev --pretty=format:"%h %s" | while read commit; do commit_id=$(echo $commit | awk '{print $1}'); commit_msg=$(echo $commit | cut -d" " -f2-); echo "Commit Message: $commit_msg"; done | sort -u > /tmp/sync_mtp_openvela

$ diff /tmp/sync_mtp_4_0 /tmp/sync_mtp_openvela | grep "< "
< Commit Message: external/mtp: adjust max io buffer size to reduce memory used 10M -> 2M # c48568f # No need
< Commit Message: external/mtp-responder: Make operation CopyObject optional              # PR #10
< Commit Message: mtp-responder: adjust config about device/vendor name and storage name  # 0c1733f # No need
< Commit Message: mtp-responder: fix compile break when disable mtp-responder.            # PR #16 

$ diff /tmp/sync_mtp_3_5 /tmp/sync_mtp_openvela | grep "< "
< Commit Message: external/mtp-responder: add debug log for transfer file from device to PC            # (revert)
< Commit Message: external/mtp-responder: Make operation CopyObject optional                           # PR #10
< Commit Message: mtp-responder: Fix strict-prototypes warnings                                        # 757ebfb # No need
< Commit Message: Revert "external/mtp-responder: add debug log for transfer file from device to PC"   # (revert)

$ rm /tmp/sync_mtp_4_0 /tmp/sync_mtp_3_5 /tmp/sync_mtp_openvela

Waiting to be merged: #10, #16