OMAP3: TAM3517: add macros for reading eeprom

Added macros to read SOM information from the I2C
EEPROM.

Signed-off-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/technexion/twister/twister.c b/board/technexion/twister/twister.c
index 1471559..c9eea9b 100644
--- a/board/technexion/twister/twister.c
+++ b/board/technexion/twister/twister.c
@@ -98,9 +98,12 @@
 	return 0;
 }
 
+#ifndef CONFIG_SPL_BUILD
 int misc_init_r(void)
 {
 	char *eth_addr;
+	struct tam3517_module_info info;
+	int ret;
 
 	dieid_num_r();
 
@@ -108,12 +111,13 @@
 	if (eth_addr)
 		return 0;
 
-#ifndef CONFIG_SPL_BUILD
-	TAM3517_READ_MAC_FROM_EEPROM;
-#endif
+	TAM3517_READ_EEPROM(&info, ret);
+	if (!ret)
+		TAM3517_READ_MAC_FROM_EEPROM(&info);
 
 	return 0;
 }
+#endif
 
 /*
  * Routine: set_muxconf_regs