video/macfb: Always initialize DAFB colour table pointer register

Don't skip the framebuffer CLUT pointer register initialization when
the first dafb_setpalette() invocation has regno equal to zero.
Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/macfb.c

@@ -148,7 +148,7 @@ static int dafb_setpalette(unsigned int regno, unsigned int red,
 			   unsigned int green, unsigned int blue,
 			   struct fb_info *info)
 {
-	static int lastreg = -1;
+	static int lastreg = -2;
 	unsigned long flags;
 
 	local_irq_save(flags);