meta-romulus: Add fan control yaml configs

1. The config follows Witherspoon's and remove water-cool/gpu/pcie
related configs.
2. Uses FanPwm interface instead of FanSpeed.
3. Removed zone_condition related config which is optional. Romulus is
always air cooled.
4. Updated to use groups for events.

Tested: Verified that fan control automatically adjust fan speeds based
        on temperatures.

Change-Id: I386c7e921557ef53b445cafe504d2927a76e8e38
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-fan-config-native/fans.yaml b/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-fan-config-native/fans.yaml
new file mode 100644
index 0000000..f910e62
--- /dev/null
+++ b/meta-romulus/recipes-phosphor/fans/phosphor-fan-control-fan-config-native/fans.yaml
@@ -0,0 +1,16 @@
+fans:
+  - inventory: /system/chassis/motherboard/fan0
+    cooling_zone: 0
+    sensors:
+      - fan0
+    target_interface: xyz.openbmc_project.Control.FanPwm
+  - inventory: /system/chassis/motherboard/fan1
+    cooling_zone: 0
+    sensors:
+      - fan1
+    target_interface: xyz.openbmc_project.Control.FanPwm
+  - inventory: /system/chassis/motherboard/fan2
+    cooling_zone: 0
+    sensors:
+      - fan2
+    target_interface: xyz.openbmc_project.Control.FanPwm