siemens: eeprom: simplify setup & read

Since we have boards using the driver model or not for i2c, use abstraction
function to probe the i2c, check the EEPROM and read from EEPROM.

Signed-off-by: Enrico Leto <enrico.leto@siemens.com>
diff --git a/board/siemens/pxm2/mux.c b/board/siemens/pxm2/mux.c
index d21ef47..07cf567 100644
--- a/board/siemens/pxm2/mux.c
+++ b/board/siemens/pxm2/mux.c
@@ -17,7 +17,7 @@
 #include <asm/arch/mux.h>
 #include <asm/io.h>
 #include <i2c.h>
-#include "board.h"
+#include "eeprom.h"
 
 static struct module_pin_mux uart0_pin_mux[] = {
 	{OFFSET(uart0_rxd), (MODE(0) | PULLUP_EN | RXACTIVE)},	/* UART0_RXD */