staging: r8188eu: Add files for new driver - part 15

This commit adds files hal/rtl8188e_rxdesc.c, hal/rtl8188e_sreset.c, and
hal/rtl8188e_xmit.c.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>