staging: rtl8192e: Remove dead code: mp_adapter

mp_adapter structure was used in past, but now is only initialized and
never read.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8192e/rtl8192e/rtl_core.h
Simple merge

diff --cc drivers/staging/rtl8192e/rtl8192e/rtl_pci.c
Simple merge

diff --cc drivers/staging/rtl8192e/rtl8192e/rtl_pci.h
Simple merge