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

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

Change-Id: I0d7357c615ed83d2d172d18fce19df71b1c70847
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/meta-romulus/recipes-phosphor/gpio/id-button.bb b/meta-romulus/recipes-phosphor/gpio/id-button.bb
index 90513b4..cd2bab9 100644
--- a/meta-romulus/recipes-phosphor/gpio/id-button.bb
+++ b/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"