linux/fb.h: Spelling s/palette/palette/

Fix a misspelling of "palette" in a comment.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Signed-off-by: Helge Deller <deller@gmx.de>

include/uapi/linux/fb.h

@@ -182,7 +182,7 @@ struct fb_fix_screeninfo {
  *
  * For pseudocolor: offset and length should be the same for all color
  * components. Offset specifies the position of the least significant bit
- * of the pallette index in a pixel value. Length indicates the number
+ * of the palette index in a pixel value. Length indicates the number
  * of available palette entries (i.e. # of entries = 1 << length).
  */
 struct fb_bitfield {