pxa168fb: remove useless vsync/hsync invert flag

fb_var_screeninfo.var has already encoded this information.
Signed-off-by: Jun Nie <njun@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

include/video/pxa168fb.h

@@ -117,8 +117,6 @@ struct pxa168fb_mach_info {
 	unsigned	invert_composite_blank:1;
 	unsigned	invert_pix_val_ena:1;
 	unsigned	invert_pixclock:1;
-	unsigned	invert_vsync:1;
-	unsigned	invert_hsync:1;
 	unsigned	panel_rbswap:1;
 	unsigned	active:1;
 	unsigned	enable_lcd:1;