meta-ampere: handle Overtemp Fault LED

Assert Fault LED when detecting OVERTEMP signal asserted.
This is done by adding new overtemp_fault LED group and
update the overtemp service to assert/de-assert the LED
group.

1. Start the ampere_overtemp@.service
2. Verify that the `Fault Led` is turned on and turn off after 10s.
3. Verify that Thermal Trip SEL is created.

Signed-off-by: Hieu Huynh <hieuh@os.amperecomputing.com>
Change-Id: Ifbc203bf79a13741082d84850b9e75ca6148a6cd
diff --git a/meta-ampere/meta-jade/recipes-phosphor/leds/phosphor-led-manager/led-group-config.json b/meta-ampere/meta-jade/recipes-phosphor/leds/phosphor-led-manager/led-group-config.json
index bec2a99..b92fa87 100644
--- a/meta-ampere/meta-jade/recipes-phosphor/leds/phosphor-led-manager/led-group-config.json
+++ b/meta-ampere/meta-jade/recipes-phosphor/leds/phosphor-led-manager/led-group-config.json
@@ -42,6 +42,17 @@
 					"Period": 1000
 				}
 			]
+		},
+		{
+			"group": "overtemp_fault",
+			"members": [
+				{
+					"Name": "fault",
+					"Action": "On",
+					"DutyOn": 50,
+					"Period": 1000
+				}
+			]
 		}
 	]
 }