Set MUX i2c slave port to be 1

The i2c controller info attribute for the I2C Mux target had the
port information set incorrectly. This commit addresses that and
adds a debug trace that was helpful in figuring out this issue

Change-Id: I34b5c920e8fe4f0f0ea68ce5aaf268095aab9886
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74864
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Roland Veloz <rveloz@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>

src/usr/i2c/i2c.C

@@ -4962,6 +4962,9 @@ errlHndl_t i2cRegisterOp ( DeviceFW::OperationType i_opType,
                         (i_args.engine * P9_ENGINE_SCOM_OFFSET);
             op_size=8;
 
+            TRACUCOMP( g_trac_i2c,
+                       "i2cRegisterOp() op_addr: 0x%lx  io_data_64: 0x%lx",op_addr, *io_data_64 );
+
             err = DeviceFW::deviceOp( i_opType,
                                       i_target,
                                       io_data_64,

src/usr/targeting/common/xmltohb/simics_AXONE.system.xml

@@ -13521,7 +13521,7 @@
         <id>FAPI_I2C_CONTROL_INFO</id>
         <default>
             <field><id>i2cMasterPath</id><value>physical:sys-0/node-0/proc-0</value></field>
-            <field><id>port</id><value>0</value></field>
+            <field><id>port</id><value>1</value></field>
             <field><id>devAddr</id><value>0xE0</value></field>
             <field><id>engine</id><value>3</value></field>
         </default>