ppc4xx: Add support for AMCC 405EP Taihu board

Signed-off-by: John Otken <john@softadvances.com>
diff --git a/include/dtt.h b/include/dtt.h
index 842a761..2e8c690 100644
--- a/include/dtt.h
+++ b/include/dtt.h
@@ -29,6 +29,7 @@
 
 #if defined(CONFIG_DTT_LM75) || \
     defined(CONFIG_DTT_DS1621) || \
+    defined(CONFIG_DTT_DS1775) || \
     defined(CONFIG_DTT_LM81) || \
     defined(CONFIG_DTT_ADM1021)
 
@@ -78,6 +79,13 @@
 #define DTT_CONFIG		0xAC
 #endif
 
+#if defined(CONFIG_DTT_DS1775)
+#define DTT_READ_TEMP		0x0
+#define DTT_CONFIG		0x1
+#define DTT_TEMP_HYST		0x2
+#define DTT_TEMP_OS		0x3
+#endif
+
 #if defined(CONFIG_DTT_ADM1021)
 #define DTT_READ_LOC_VALUE	0x00
 #define DTT_READ_REM_VALUE	0x01