meta-phosphor: switch to meta-oe libcereal

A cereal recipe was added recently to meta-openembedded.  Use it so we
can deprecate our version of it.

Change-Id: I8345370d39c8c8e0faf73228c31d49a970435616
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/recipes-phosphor/state/phosphor-state-manager.bb b/recipes-phosphor/state/phosphor-state-manager.bb
index 97d3dc7..2ec65c1 100644
--- a/recipes-phosphor/state/phosphor-state-manager.bb
+++ b/recipes-phosphor/state/phosphor-state-manager.bb
@@ -41,7 +41,7 @@
 DEPENDS += "sdeventplus"
 DEPENDS += "phosphor-logging"
 DEPENDS += "phosphor-dbus-interfaces"
-DEPENDS += "cereal"
+DEPENDS += "libcereal"
 RDEPENDS_${PN} += "sdbusplus"
 
 RDEPENDS_${PN}-host += "libsystemd phosphor-dbus-interfaces"