AMD AGESA: Remove INVD instruction when transitioning from CAR

The AMD AGESA function to move the stack from cache-as-ram to
actual RAM doesn't need any help.  The current implementation has
an INVD instruction just before cache-as-RAM is torn down. It isn't
needed for Trinity processors and makes Kabini boot unreliable.

Change-Id: Ibe9e4105eee032471ccbb2d537471d5fa5847d22
Signed-off-by: Bruce Griffith <bruce.griffith@se-eng.com>
Reviewed-on: http://review.coreboot.org/3852
Tested-by: build bot (Jenkins)
Reviewed-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

src/cpu/amd/agesa/cache_as_ram.inc

@@ -85,6 +85,7 @@ stop:
 
 disable_cache_as_ram:
   /* Save return stack */
+  movd 0(%esp), %xmm1
   movd %esp, %xmm0
 
   /* Disable cache */
@@ -92,8 +93,6 @@ disable_cache_as_ram:
   orl	$CR0_CacheDisable, %eax
   movl	%eax, %cr0
 
-  invd
-
   AMD_DISABLE_STACK
 
   /* enable cache */
@@ -103,7 +102,9 @@ disable_cache_as_ram:
   xorl %eax, %eax
 
   /* Restore the return stack */
+  wbinvd
   movd %xmm0, %esp
+  movd %xmm1, (%esp)
   ret
 
 cache_as_ram_setup_out: