staging: r8188eu: usb_read_port_complete needs no regs parameter

staging: r8188eu: usb_read_port_complete needs no regs parameter

Remove the regs parameter from usb_read_port_complete, it is not used.

Without the regs parameter, there's no need for the define that makes
usb_read_port_complete usable as urb callback function.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20230124210108.62170-2-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>