Allow 64bits bitParameterBlocks

BZ: 59348

bitParameterBlocks are limited to 32 bits, extend it to 64 bits.
This change includes:
- PFW code change
- XML schema update

Change-Id: I9861cea0538a17fcba77fa7d573faae36d8731e0
Signed-off-by: Guillaume Denneulin <guillaume.denneulin@intel.com>
Reviewed-on: http://android.intel.com:8080/68189
Reviewed-by: Gozalvez Herrero, Juan AntonioX <juan.antoniox.gozalvez.herrero@intel.com>
Tested-by: Gozalvez Herrero, Juan AntonioX <juan.antoniox.gozalvez.herrero@intel.com>
diff --git a/parameter/Element.cpp b/parameter/Element.cpp
index 220005b..aa4f1b1 100644
--- a/parameter/Element.cpp
+++ b/parameter/Element.cpp
@@ -169,6 +169,15 @@
     return ostr.str();
 }
 
+string CElement::toString(uint64_t uiValue)
+{
+    ostringstream ostr;
+
+    ostr << uiValue;
+
+    return ostr.str();
+}
+
 string CElement::toString(int32_t iValue)
 {
     ostringstream ostr;