HID: Allow HID_BATTERY_STRENGTH to be enabled

Allows for HID_BATTERY_STRENGTH config be enabled without the need for HID
module to be built-in, prior to this HID and POWER_SUPPLY had to be equal, and
now we only select POWER_SUPPLY and depend on the HID module.
Signed-off-by: Daniel Nicoletti <dantti12@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/Kconfig

@@ -27,7 +27,8 @@ if HID
 
 config HID_BATTERY_STRENGTH
 	bool "Battery level reporting for HID devices"
-	depends on HID && POWER_SUPPLY && HID = POWER_SUPPLY
+	depends on HID
+	select POWER_SUPPLY
 	default n
 	---help---
 	This option adds support of reporting battery strength (for HID devices