fbdev: clean the penguin's dirty feet

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: Clemens Ladisch <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>
Cc: Krzysztof Helt <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>