staging: xgifb: constify LCD data

Make read-only LCD data tables const.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/xgifb/vb_setmode.c
Simple merge

diff --cc drivers/staging/xgifb/vb_struct.h
Simple merge

diff --cc drivers/staging/xgifb/vb_table.h
Simple merge