staging: vt6655: replace typedef struct tagDEVICE_RD_INFO

with struct vnt_rd_info

volatile is removed because it will generate a warning
(in any case this member is not) and renaming rd_info.

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