fbdev: sh_mobile_lcdcfb: fixup LDHAJR :: HSYNPAJ needs mask

LDHAJR register will be broken by hsync_pos without this patch
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>

drivers/video/sh_mobile_lcdcfb.c

@@ -420,7 +420,7 @@ static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
 	tmp = ((display_var->xres & 7) << 24) |
 		((display_h_total & 7) << 16) |
 		((display_var->hsync_len & 7) << 8) |
-		hsync_pos;
+		(hsync_pos & 7);
 	lcdc_write_chan(ch, LDHAJR, tmp);
 }