xip_image: GPTR/overlays stage 1 support

Updated p9_xip_dd_section_support to return "overlays not
supported" if sectionId==.overlays is passed as arg.

Further add a small update to xip_image.C to clear the
ddSupport field in XipSection upon deleting a section.

Change-Id: If64a8a6d7046aa857bd2c3f8ca8c1092565df5ad
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40546
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Richard J. Knight <rjknight@us.ibm.com>
Reviewed-by: Sumit Kumar <sumit_kumar@in.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40647
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>

src/import/chips/p9/xip/p9_xip_image.C

@@ -559,7 +559,6 @@ xipSetSectionSize(void* io_image, const int i_section, const uint32_t i_size)
 
 
 /// Set the properties of a section
-//
 XIP_STATIC int
 xipSetSectionProps(void* io_image, const int i_section, const uint8_t i_props)
 {
@@ -3265,6 +3264,11 @@ int p9_xip_dd_section_support(const void* i_image,
     int rc;
     P9XipSection section;
 
+    if (i_sectionId == P9_XIP_SECTION_HW_OVERLAYS)
+    {
+        return P9_XIP_OVERLAYS_NOT_SUPPORTED;
+    }
+
     rc = p9_xip_get_section(i_image, i_sectionId, &section);
 
     if (!rc)

src/import/chips/p9/xip/p9_xip_image.h

@@ -1506,6 +1506,8 @@ p9_xip_decode_toc_dump(void* i_image, void* i_dump,
 
 /// Code bug in the ddLevel handling codes
 #define P9_XIP_DDLEVEL_CODE_BUG 22
+/// Temporary error code to help prevent image co-req for stage 2 release of RTC174302
+#define P9_XIP_OVERLAYS_NOT_SUPPORTED 23
 
 /// Applications can expand this macro to declare an array of string forms of
 /// the error codes if desired.
@@ -1534,6 +1536,7 @@ p9_xip_decode_toc_dump(void* i_image, void* i_dump,
         "P9_XIP_NO_DDLEVEL_SUPPORT", \
         "P9_XIP_DDLEVEL_NOT_FOUND",  \
         "P9_XIP_DDLEVEL_CODE_BUG",  \
+        "P9_XIP_OVERLAYS_NOT_SUPPORTED",  \
     }
 
 /// Applications can use this macro to safely index the array of error