staging:r8188eu: remove unnecessary trace output in rtw_recv_indicatepkt()

Trace output for each received packet in rtw_recv_indicatepkt() is redudant.
Remove it.

Signed-off-by: Ivan Safonov <insafonov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>