Cougar Point southbridge: Add includes and drop post_code()

post_code() was added in our internal tree by duplicating code. It's not of
much use at this point, since the code is quite well tested, so avoid bloating
the bootblock (since compiled with ROMCC).
Also add some missing include files that didn't seem to be needed with an
older version of coreboot.

Change-Id: Id62b838728a247e8bcadb4f1db17269be0d4f3f4
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/936
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/southbridge/intel/bd82x6x/bootblock.c

@@ -17,6 +17,9 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+#include <arch/io.h>
+#include <arch/romcc_io.h>
+#include <cpu/x86/tsc.h>
 #include "pch.h"
 
 static void store_initial_timestamp(void)
@@ -59,7 +62,6 @@ static void enable_port80_on_lpc(void)
 	u32 reg32 = *gcs;
 	reg32 = reg32 & ~0x04;
 	*gcs = reg32;
-	post_code(0x01);
 #endif
 }