siemens: board: clean up includes

Many includes were not removed when code parts were moved or removed.

Signed-off-by: Enrico Leto <enrico.leto@siemens.com>
diff --git a/board/siemens/rut/mux.c b/board/siemens/rut/mux.c
index 894a9bf..8947e4e 100644
--- a/board/siemens/rut/mux.c
+++ b/board/siemens/rut/mux.c
@@ -11,12 +11,10 @@
  * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
  */
 
-#include <common.h>
+#include <asm/io.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/arch/hardware.h>
 #include <asm/arch/mux.h>
-#include <asm/io.h>
-#include <i2c.h>
 
 static struct module_pin_mux uart0_pin_mux[] = {
 	{OFFSET(uart0_rxd), (MODE(0) | PULLUDDIS | RXACTIVE)},	/* UART0_RXD */