staging: rtl8723bs: Convert LIST_CONTAINOR to use kernel container_of

These are similar macros so use the normal kernel one.

As well, there are odd games being played with casting a plist to
a union recv_frame by using LIST_CONTAINOR.  Just use a direct cast
to union recv_frame instead.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>