staging: vt6656: rxtx.c s_vFillRTSHead Parse out struct vnt_rts_g_fb to new function.

Parse out vnt_rts_g_fb code to new function vnt_rxtx_rts_g_fb_head.

Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>