ARM: tegra: Enable Acer A500 drivers

Enable EC controller drivers of the Acer A500 tablet.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/configs/tegra_defconfig

@@ -159,6 +159,7 @@ CONFIG_POWER_RESET_AS3722=y
 CONFIG_POWER_RESET_GPIO=y
 CONFIG_BATTERY_SBS=y
 CONFIG_BATTERY_BQ27XXX=y
+CONFIG_BATTERY_ACER_A500=y
 CONFIG_CHARGER_GPIO=y
 CONFIG_CHARGER_SMB347=y
 CONFIG_CHARGER_TPS65090=y
@@ -182,6 +183,7 @@ CONFIG_MFD_PALMAS=y
 CONFIG_MFD_TPS65090=y
 CONFIG_MFD_TPS6586X=y
 CONFIG_MFD_TPS65910=y
+CONFIG_MFD_ACER_A500_EC=y
 CONFIG_REGULATOR=y
 CONFIG_REGULATOR_FIXED_VOLTAGE=y
 CONFIG_REGULATOR_AS3722=y
@@ -266,6 +268,7 @@ CONFIG_LEDS_TRIGGER_GPIO=y
 CONFIG_LEDS_TRIGGER_DEFAULT_ON=y
 CONFIG_LEDS_TRIGGER_TRANSIENT=y
 CONFIG_LEDS_TRIGGER_CAMERA=y
+CONFIG_LEDS_ACER_A500=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_AS3722=y
 CONFIG_RTC_DRV_DS1307=y