staging: r8188eu: only the bulk in ep is used for network data

All supported devices use a single bulk in endpoint for receiving
network data.

The rtw_read_port function needs no addr parameter. The ff_hwaddr in
struct recv_priv is also a constant value. We can use RECV_BULK_IN_ADDR
directly.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20211126173205.21352-3-martin@kaiser.cx


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