common: Move some board functions out of common.h

A number of board function belong in init.h with the others. Move them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/board/warp/warp.c b/board/warp/warp.c
index a44a578..f7bff53 100644
--- a/board/warp/warp.c
+++ b/board/warp/warp.c
@@ -7,6 +7,7 @@
  * Author: Otavio Salvador <otavio@ossystems.com.br>
  */
 
+#include <init.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/iomux.h>
 #include <asm/arch/imx-regs.h>