battery: Add missing syscfg definition
BATTERY_DRIVERS_MAX was used in battery.h but it was never
defined, this fixes this inconsistency.
@@ -36,3 +36,8 @@ syscfg.defs:
description: >
Sysinit stage for battery functionality.
value: 501
+
+ BATTERY_DRIVERS_MAX:
+ description: >
+ Number of battery drivers that can be registered.
+ value: 2
