Move top level pc80 directory to drivers/

There is no reason for this to be a top level directory.
Some stuff from lib/ should also be moved to drivers/

Change-Id: I3c2d2e127f7215eadead029cfc7442c22b26814a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/939
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/mainboard/soyo/sy-6ba-plus-iii/romstage.c

@@ -28,7 +28,7 @@
 #include <console/console.h>
 #include "southbridge/intel/i82371eb/i82371eb.h"
 #include "northbridge/intel/i440bx/raminit.h"
-#include "pc80/udelay_io.c"
+#include "drivers/pc80/udelay_io.c"
 #include "lib/delay.c"
 #include "cpu/x86/bist.h"
 void it8671f_48mhz_clkin(void);