board: cei: Remove <common.h> and add needed includes

Remove <common.h> from this board vendor directory and when needed
add missing include files directly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/board/cei/cei-tk1-som/cei-tk1-som.c b/board/cei/cei-tk1-som/cei-tk1-som.c
index 95ee7bb..15b2004 100644
--- a/board/cei/cei-tk1-som/cei-tk1-som.c
+++ b/board/cei/cei-tk1-som/cei-tk1-som.c
@@ -4,7 +4,7 @@
  * NVIDIA Corporation <www.nvidia.com>
  */
 
-#include <common.h>
+#include <linux/kernel.h>
 #include <power/as3722.h>
 
 #include <asm/arch/gpio.h>