amifb: Register Amiga-specific video modes with sysfs

Register the Amiga-specific video modes with sysfs, so you can see them in
/sys/class/graphics/fb0/modes and change the video mode by writing to
/sys/class/graphics/fb0/mode.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/amifb.c

@@ -2383,6 +2383,9 @@ default_chipset:
 		goto amifb_error;
 	}
 
+	fb_videomode_to_modelist(ami_modedb, NUM_TOTAL_MODES,
+				 &fb_info.modelist);
+
 	round_down_bpp = 0;
 	chipptr = chipalloc(fb_info.fix.smem_len+
 	                    SPRITEMEMSIZE+