Modify freq & dep. files. Add cas latency & unit tests

Change-Id: I2986817812afcd35c4f3a7ed2d7abdd45454f6dc
Original-Change-Id: I205bf48e54fb3c8f19f973f58f8ec1d4c7345a23
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/22632
Tested-by: PPE CI
Tested-by: Jenkins Server
Reviewed-by: Brian R. Silver <bsilver@us.ibm.com>
Tested-by: Hostboot CI
Reviewed-by: JACOB L. HARVEY <jlharvey@us.ibm.com>
Reviewed-by: STEPHEN GLANCY <sglancy@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/69761
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
Tested-by: Sachin Gupta <sgupta2m@in.ibm.com>

src/import/chips/p9/procedures/xml/attribute_info/memory_mcs_attributes.xml

@@ -639,7 +639,12 @@
         </description>
         <valueType>uint64</valueType>
         <!-- We rely on these being their actual MT/s for freq/time conversions -->
-        <enum>MT1866 = 1866, MT2400 = 2400, MT2133 = 2133, MT2666 = 2666</enum>
+        <enum>
+          MT1866 = 1866,
+          MT2133 = 2133,
+          MT2400 = 2400,
+          MT2666 = 2666
+        </enum>
         <writeable/>
         <odmVisable/>
         <odmChangeable/>
@@ -1788,14 +1793,11 @@
 
     <attribute>
         <id>ATTR_EFF_DRAM_CL</id>
-        <!-- P8 MBA level information, is this the right target? AAM -->
         <targetType>TARGET_TYPE_MCS</targetType>
         <description>
             CAS Latency.
-            Used in various locations and is computed in mss_eff_cnfg_timing.
-            Can be overwritten by ODM vendors if done from the PNOR or odm_eff_cnfg.
             Each memory channel will have a value.
-            creator: mss_eff_cnfg_timing
+            creator: mss_freq
             consumer: various
             firmware notes: none
         </description>