add p9dsu project.

[stewart@linux.vnet.ibm.com: bump skiboot to 5.5.0 final]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
diff --git a/openpower/package/Config.in b/openpower/package/Config.in
index 5c18681..ab1614a 100755
--- a/openpower/package/Config.in
+++ b/openpower/package/Config.in
@@ -23,3 +23,4 @@
 source "$BR2_EXTERNAL_OP_BUILD_PATH/package/zaius-xml/Config.in"
 source "$BR2_EXTERNAL_OP_BUILD_PATH/package/ima-catalog/Config.in"
 source "$BR2_EXTERNAL_OP_BUILD_PATH/package/sbe/Config.in"
+source "$BR2_EXTERNAL_OP_BUILD_PATH/package/p9dsu-xml/Config.in"