vga: add ati bios tables

Needed to make drivers happy which try to gather
informations from these tables.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

vgasrc/ati-tables.S

@@ -0,0 +1,43 @@
+//
+// Fake ati bios tables.
+//
+// aty128fb and radeonfb try to gather informations from these tables,
+// so add some stuff here to make the drivers happy.  Specifically
+// radeonfb needs the pll information, otherwise it'll crash with a
+// division by zero ...
+//
+	.org 0x48
+	.word _ati_main
+
+	// main info
+	.org 0x50
+_ati_main:
+	.org 0x50 + 0x30
+	.word _ati_pll
+	.org 0x50 + 0x50
+	.word _ati_connector
+
+	// pll info
+	.org 0x100
+_ati_pll:
+	.word	0		// ??? (not used by radeonfb)
+	.word	0
+	.word	0
+	.word	0
+	.word	23000		// sclk
+	.word	23000		// mclk
+	.word	0
+	.word	2700		// ref_clk
+	.word	4		// ref_div
+	.long	12000		// ppll_min
+	.long	35000		// ppll_max
+
+	// connector info
+	.org 0x140
+_ati_connector:
+	.byte 0x10		// one chip
+	.byte 0x01		// one connector
+	.word 0x3000		// type DVI-I
+	.word 0			// end of list
+
+	.org 0x200

vgasrc/vgaentry.S

@@ -40,6 +40,9 @@ _rom_header_other2:
 _rom_header_signature:
         .asciz "IBM"
 
+#if CONFIG_VGA_ATI
+#include "ati-tables.S"
+#endif
 
 /****************************************************************
  * Entry points