ec/lenovo/h8: Allow control of low-battery beep.

Change-Id: I2f422e83f2afcf0cc3f3ecbace01a8f4f39e87d4
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4663
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/mainboard/lenovo/x60/cmos.default b/src/mainboard/lenovo/x60/cmos.default
index 883bfd4..663fe5c 100644
--- a/src/mainboard/lenovo/x60/cmos.default
+++ b/src/mainboard/lenovo/x60/cmos.default
@@ -15,3 +15,4 @@
 fn_ctrl_swap=Disable
 sticky_fn=Disable
 power_management_beeps=Enable
+low_battery_beep=Enable