fbdev: clean the penguin's dirty feet

When booting in a direct color mode, the penguin has dirty feet, i.e.,
some pixels have the wrong color.  This is caused by
fb_set_logo_directpalette() which does not initialize the last 32 palette
entries.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/fbmem.c

@@ -230,7 +230,7 @@ static void fb_set_logo_directpalette(struct fb_info *info,
 	greenshift = info->var.green.offset;
 	blueshift = info->var.blue.offset;
 
-	for (i = 32; i < logo->clutsize; i++)
+	for (i = 32; i < 32 + logo->clutsize; i++)
 		palette[i] = i << redshift | i << greenshift | i << blueshift;
 }