Revert "ptp: Switch back to struct platform_driver::remove()"

This reverts commit b32913a5.

Linus applied directly commit e70140ba ("Get rid of 'remove_new'
relic from platform driver struct"), drop our local change to avoid
conflicts.

Link: https://lore.kernel.org/CAMuHMdV3J=o2x9G=1t_y97iv9eLsPfiej108vU6JHnn=AR-Nvw@mail.gmail.com


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