sm501fb: direct color visual does not work

The sm501fb palette code clearly does not handle direct color so change the
driver to use true color visual for 16bpp.

Signed-off-by: Ville Syrjala <syrjala@sci.fi>
Acked-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/sm501fb.c

@@ -397,7 +397,7 @@ static int sm501fb_set_par_common(struct fb_info *info,
 		break;
 
 	case 16:
-		info->fix.visual = FB_VISUAL_DIRECTCOLOR;
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
 		break;
 
 	case 32:
@@ -613,6 +613,7 @@ static int sm501fb_set_par_crt(struct fb_info *info)
 
 	case 16:
 		control |= SM501_DC_CRT_CONTROL_16BPP;
+		sm501fb_setup_gamma(fbi, SM501_DC_CRT_PALETTE);
 		break;
 
 	case 32:
@@ -750,6 +751,7 @@ static int sm501fb_set_par_pnl(struct fb_info *info)
 
 	case 16:
 		control |= SM501_DC_PANEL_CONTROL_16BPP;
+		sm501fb_setup_gamma(fbi, SM501_DC_PANEL_PALETTE);
 		break;
 
 	case 32: