Set "CONF_" CI counter to fail on 3 or more definitions (#6668)

esphome/components/power_supply/__init__.py

@@ -1,15 +1,19 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome import pins
-from esphome.const import CONF_ENABLE_TIME, CONF_ID, CONF_KEEP_ON_TIME, CONF_PIN
+from esphome.const import (
+    CONF_ENABLE_ON_BOOT,
+    CONF_ENABLE_TIME,
+    CONF_ID,
+    CONF_KEEP_ON_TIME,
+    CONF_PIN,
+)
 
 CODEOWNERS = ["@esphome/core"]
 power_supply_ns = cg.esphome_ns.namespace("power_supply")
 PowerSupply = power_supply_ns.class_("PowerSupply", cg.Component)
 MULTI_CONF = True
 
-CONF_ENABLE_ON_BOOT = "enable_on_boot"
-
 CONFIG_SCHEMA = cv.Schema(
     {
         cv.Required(CONF_ID): cv.declare_id(PowerSupply),