defconfig: Enable heartbeat led trigger on 8960

This trigger can be useful to see if the CPU is still able to
execute code.

Change-Id: Ic0af1fa456918d31db567cb53545bdb9690391df
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/arch/arm/configs/msm8960_defconfig b/arch/arm/configs/msm8960_defconfig
index c869beb..235db63 100755
--- a/arch/arm/configs/msm8960_defconfig
+++ b/arch/arm/configs/msm8960_defconfig
@@ -355,6 +355,7 @@
 CONFIG_LEDS_PM8XXX=y
 # CONFIG_LEDS_MSM_PMIC is not set
 CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_SWITCH=y
 CONFIG_RTC_CLASS=y
 # CONFIG_RTC_DRV_MSM is not set