fix errors in service file

The service file had a substitution that was no longer
getting done on install; change it with the real path.

The service file also emitted a warning because the dependency
was not listed by type (.service)

Change-Id: I804daf2909202e625419ec03e5fde567a577128f
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
diff --git a/phosphor-ipmi-kcs@.service b/phosphor-ipmi-kcs@.service
index 43cce3b..56c0b72 100644
--- a/phosphor-ipmi-kcs@.service
+++ b/phosphor-ipmi-kcs@.service
@@ -1,11 +1,11 @@
 [Unit]
 Description=Phosphor IPMI KCS DBus Bridge
-Requires=phosphor-ipmi-host
-After=phosphor-ipmi-host
+Requires=phosphor-ipmi-host.service
+After=phosphor-ipmi-host.service
 
 [Service]
 Restart=always
-ExecStart={bindir}/kcsbridged -c "%i"
+ExecStart=/usr/bin/kcsbridged -c "%i"
 SyslogIdentifier=kcsbridged-%i
 
 [Install]