Enable I/O PPE PHY Communication for Abus

- Before the image is loaded we need to set the
    ppe gcr mode bit high.  Otherwise the ppe
    will not be able to communicate with the phy
    and the abus workaround code will not work.

Change-Id: If0ded21d09196aab169023df9a3e0fa609e6db83
CQ: SW438477
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/62348
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Gary A. Peterson <garyp@us.ibm.com>
Reviewed-by: Joseph J. McGill <jmcgill@us.ibm.com>
Reviewed-by: Richard J. Knight <rjknight@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/62786
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/p9/procedures/hwp/io/p9_io_obus_image_build.C

@@ -40,7 +40,10 @@
 #include <p9_io_obus_image_build.H>
 #include "p9_xip_image.h"
 
-//---------------------------------------------------------------------------
+#include "p9_obus_scom_addresses.H"
+#include "p9_obus_scom_addresses_fld.H"
+
+//--------------------------------------------------------------------------
 fapi2::ReturnCode extractPpeImgObus(void* const iImagePtr, const int iSectionId, uint8_t*& oObusImgPtr, uint32_t& oSize)
 {
     FAPI_IMP("Entering getObusImageFromHwImage.");
@@ -131,6 +134,12 @@ fapi2::ReturnCode p9_io_obus_image_build(CONST_OBUS& iTgt, void* const iHwImageP
         {
             FAPI_IMP("ABUS IMAGE LOAD.");
             loadImage = true;
+
+            // Enable the PPE to communicate with the PHY
+            fapi2::buffer<uint64_t> data64;
+            FAPI_TRY(fapi2::getScom(iTgt, OBUS_SCOM_MODE_PB, data64));
+            data64.setBit<OBUS_SCOM_MODE_PB_PPE_GCR>();
+            FAPI_TRY(fapi2::putScom(iTgt, OBUS_SCOM_MODE_PB, data64));
         }
     }
     else // fapi2::ENUM_ATTR_OPTICS_CONFIG_MODE_CAPI