meta-ibm: move all services to multi-user.target

Instead of obmc-standby.target, use multi-user.target.

(From meta-ibm rev: 85cff8cc9e66049d8ac26271c13f82d894ac572f)

Change-Id: I03c3d41c031343fa584511889c70e3def92cb83d
Signed-off-by: Patrick Venture <venture@google.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-ibm/meta-romulus/recipes-phosphor/gpio/id-button.bb b/meta-ibm/meta-romulus/recipes-phosphor/gpio/id-button.bb
index 90513b4..cd2bab9 100644
--- a/meta-ibm/meta-romulus/recipes-phosphor/gpio/id-button.bb
+++ b/meta-ibm/meta-romulus/recipes-phosphor/gpio/id-button.bb
@@ -23,7 +23,7 @@
 
 TMPL = "phosphor-gpio-monitor@.service"
 INSTFMT = "phosphor-gpio-monitor@{0}.service"
-TGT = "${SYSTEMD_DEFAULT_TARGET}"
+TGT = "multi-user.target"
 FMT = "../${TMPL}:${TGT}.requires/${INSTFMT}"
 
 SYSTEMD_SERVICE_${PN} += "id-button-pressed.service"