meta-phosphor: Add back configs for phosphor-pid-control

Necessary configurations that were in
classes/phosphor-pid-control.bbclass was dropped by
5f04ec5f04a797805afe2ac14a90c294a906ca6e. Append the config back to
phosphor-pid-control.bb

(From meta-phosphor rev: db34efb2d7df34092d2ac21f16d379efcdc55f07)

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: I54623ed0217fa4e04aed12157b74bef59645a9fa
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/recipes-phosphor/fans/phosphor-pid-control_git.bb b/meta-phosphor/recipes-phosphor/fans/phosphor-pid-control_git.bb
index 6e242ae..501a803 100644
--- a/meta-phosphor/recipes-phosphor/fans/phosphor-pid-control_git.bb
+++ b/meta-phosphor/recipes-phosphor/fans/phosphor-pid-control_git.bb
@@ -49,3 +49,8 @@
 FILES_${PN}-dev_append = " ${libdir}/ipmid-providers/lib*${SOLIBSDEV} ${libdir}/ipmid-providers/*.la"
 
 HOSTIPMI_PROVIDER_LIBRARY += "libmanualcmds.so"
+
+config_datadir="${datadir}/swampd/"
+# config_path is the location swampd expects to find a json configuration.
+# the file is expected to be named config.json
+config_path="${config_datadir}config.json"