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

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

Reviewed-by: Tony Dinh <mibodhi@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

board/iomega/iconnect/iconnect.c

@@ -6,7 +6,6 @@
  * Luka Perkov <luka@openwrt.org>
  */
 
-#include <common.h>
 #include <init.h>
 #include <netdev.h>
 #include <asm/arch/cpu.h>