Add procedure and service file to set the SPI mux on P10

This procedure will be called before powering on in order to set the mux
for accessing host EEPROMs from the BMC through the FSI SPI masters.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Change-Id: I238d3bc449c5924740cf4c2e69d794605a6ae916
diff --git a/set-spi-mux.service.in b/set-spi-mux.service.in
new file mode 100644
index 0000000..16004d2
--- /dev/null
+++ b/set-spi-mux.service.in
@@ -0,0 +1,12 @@
+[Unit]
+Description=Set the SPI mux
+ConditionPathExists=!/run/openbmc/chassis@0-on
+
+[Service]
+ExecStart=@bindir@/openpower-proc-control setSPIMux
+SyslogIdentifier=openpower-proc-control
+Type=oneshot
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target