rainier: Add max31785 hwmon device for Everest

Everest has the max31785 at a different i2c address that is behind a
mux, so install its hwmon config at that associated location.

Tested:
    Hwmon instance for the max31785 starts successfully on Everest

Signed-off-by: Matthew Barth <msbarth@us.ibm.com>
Change-Id: Ia631ec7b321dcb3353574bd32d1029626bd2af2e
diff --git a/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend b/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
index 5742840..8e4d5f6 100644
--- a/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
+++ b/recipes-phosphor/sensors/phosphor-hwmon_%.bbappend
@@ -76,6 +76,7 @@
 
 CHIPS_rainier = " \
                bus@1e78a000/i2c-bus@400/max31785@52 \
+               bus@1e78a000/i2c-bus@780/i2c-switch@70/i2c@3/max31785@52 \
                "
 
 ITEMSFMT = "ahb/apb/{0}.conf"