Revert "phosphor-mapper.bb: bump version"

Remove mapper regression introduced with
https://gerrit.openbmc-project.xyz/#/c/7579/

Mapper no longer processes object add/remove events with the
linked patch.

This reverts commit 121e3052eaacc295d17f5f6fd982eb1ed5c33892.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Change-Id: Ia6e725d70a485dfe1b9ca4c16b8569e14ef575f7
diff --git a/common/recipes-phosphor/dbus/phosphor-mapper.bb b/common/recipes-phosphor/dbus/phosphor-mapper.bb
index b5a012e..df63921 100644
--- a/common/recipes-phosphor/dbus/phosphor-mapper.bb
+++ b/common/recipes-phosphor/dbus/phosphor-mapper.bb
@@ -35,7 +35,7 @@
         "
 SRC_URI += "git://github.com/openbmc/phosphor-objmgr"
 
-SRCREV = "799e7bc959540d57dfaae67b5cd495ca4163fb0f"
+SRCREV = "c33ae65c829038c29a76070f22ab8feebd688c95"
 
 S = "${WORKDIR}/git"