[fix]some radeon build problem

[Young-Ho. Cha]

I have found some problem in building kernel with radeonfb 16bpp support at 2.4.2-ac8.

here is patch. 

--- linux/drivers/video/radeonfb.c.orig Fri Mar  2 12:29:15 2001
+++ linux/drivers/video/radeonfb.c      Fri Mar  2 12:29:28 2001
@@ -845,9 +845,11 @@
 
        rinfo->depth = disp->var.bits_per_pixel;        
         switch (disp->var.bits_per_pixel) {
+#ifdef FBCON_HAS_CFB8
                 case 8:
                         disp->dispsw = &fbcon_cfb8;
                         break;
+#endif                 
 #ifdef FBCON_HAS_CFB16
                 case 16:
                         disp->dispsw = &fbcon_cfb16;
@@ -1322,8 +1322,8 @@
                                i = (regno << 8) | regno;
                                rinfo->con_cmap.cfb32[regno] = (i << 16) | i;
                                break;
-#endif
                        }
+#endif
                }
         }
 #endif