x86: Move common LPC code to its own place

Some of the LPC code is common to several Intel LPC devices. Move it into a
common location.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/intel/cougarcanyon2/cougarcanyon2.c b/board/intel/cougarcanyon2/cougarcanyon2.c
index 31a480a..c03247c 100644
--- a/board/intel/cougarcanyon2/cougarcanyon2.c
+++ b/board/intel/cougarcanyon2/cougarcanyon2.c
@@ -10,6 +10,7 @@
 #include <pci.h>
 #include <smsc_sio1007.h>
 #include <asm/ibmpc.h>
+#include <asm/lpc_common.h>
 #include <asm/pci.h>
 #include <asm/arch/pch.h>