staging: rtl8192e: Fix RETURN_VOID warnings

Fix 'void function return statements are not generally useful'
checkpatch.pl warnings

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

diff --cc drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c
Simple merge

diff --cc drivers/staging/rtl8192e/rtl8192e/r8192E_phy.c
Simple merge

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

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

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