ARM: omap2plus_defconfig: enable TPS65218 power button

Enable tps65218 power button driver by default as
a dynamically linked module so AM437x SK can report
power button presses.

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
index efb0810..b5ccb36 100644
--- a/arch/arm/configs/omap2plus_defconfig
+++ b/arch/arm/configs/omap2plus_defconfig
@@ -182,6 +182,7 @@
 CONFIG_TOUCHSCREEN_TSC2005=m
 CONFIG_TOUCHSCREEN_TSC2007=m
 CONFIG_INPUT_MISC=y
+CONFIG_INPUT_TPS65218_PWRBUTTON=m
 CONFIG_INPUT_TWL4030_PWRBUTTON=m
 CONFIG_SERIO=m
 # CONFIG_LEGACY_PTYS is not set