meta-romulus: Add fan tacho hwmon sensor config

Change-Id: I8d1540c7f44d268154a9ff415177e4f40e31b108
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwmon/ahb/apb/pwm-tacho-controller@1e786000.conf b/meta-romulus/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwmon/ahb/apb/pwm-tacho-controller@1e786000.conf
new file mode 100644
index 0000000..6f90415
--- /dev/null
+++ b/meta-romulus/recipes-phosphor/sensors/phosphor-hwmon%/obmc/hwmon/ahb/apb/pwm-tacho-controller@1e786000.conf
@@ -0,0 +1,4 @@
+# Romulus has 7 fan ports but only 3 are used
+LABEL_fan9 = "fan0"
+LABEL_fan11 = "fan1"
+LABEL_fan13 = "fan2"