staging: rtl8188eu: remove unused function parameter

The struct adapter parameter of rtw_os_recvbuf_resource_alloc is not used.
Remove it.

While at it, use the same parameter name in the prototype and the function
definition.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20210408195601.4762-5-martin@kaiser.cx


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