staging: r8188eu: convert/remove DBG_88E calls in core/rtw_cmd.c

Convert two DBG_88E calls within core/rtw_cmd.c to netdev_dbg calls, and
remove three commented DBG_88E calls. Considering the original driver
author commented them, it seems better to delete these three than
convert.

Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20211206234952.1238-3-phil@philpotter.co.uk


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>