OMAPFB: fix framebuffer console colors

omapfb does not currently set pseudo palette correctly for color depths
above 16bpp, making red text invisible, command like
  echo -e '\e[0;31mRED' > /dev/tty1
will display nothing on framebuffer console in 24bpp mode.
This is because temporary variable is declared incorrectly, fix it.
Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/video/omap2/omapfb/omapfb-main.c

@@ -1192,7 +1192,7 @@ static int _setcolreg(struct fb_info *fbi, u_int regno, u_int red, u_int green,
 			break;
 
 		if (regno < 16) {
-			u16 pal;
+			u32 pal;
 			pal = ((red >> (16 - var->red.length)) <<
 					var->red.offset) |
 				((green >> (16 - var->green.length)) <<