pwrctl: add missing systemd/mapper build deps

Fixes openbmc/openbmc#534.

Change-Id: I05cc09041983b27a699cde3e7496cc048111d93b
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/common/recipes-phosphor/obmc-phosphor-chassis/obmc-op-control-power.bb b/common/recipes-phosphor/obmc-phosphor-chassis/obmc-op-control-power.bb
index e724472..ac8fc33 100644
--- a/common/recipes-phosphor/obmc-phosphor-chassis/obmc-op-control-power.bb
+++ b/common/recipes-phosphor/obmc-phosphor-chassis/obmc-op-control-power.bb
@@ -4,4 +4,6 @@
 
 inherit skeleton-gdbus
 
+DEPENDS += "obmc-mapper systemd"
+
 SKELETON_DIR = "op-pwrctl"