mb/starlabs/starlite_adl: Add CFR option for charge LED brightness

Add a CFR option to expose the newly-added EC control to set the charge
LED brightness (normal/dim/off).

TEST=build/boot starlabs/lite_adl, verify charge LED control via CFR

Change-Id: I090437e8de2fd65bfad93a2037fd9346347e9fc1
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Signed-off-by: Ali Hamid <ali@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90566
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Sean Rhodes <sean@starlabs.systems>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/starlabs/starlite_adl/cfr.c

@@ -48,6 +48,7 @@ static struct sm_obj_form power = {
 		&charging_speed,
 		#endif
 		&power_led,
+		&charge_led,
 		&power_on_after_fail_bool,
 		NULL
 	},