Input: tps65218-pwrbutton - fix a spelling mistake in Kconfig

Fix a spelling mistake: buttong -> button
Signed-off-by: Zhuohua Li <lizhuohua1994@gmail.com>
Patchwork-Id: 10134469
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

drivers/input/misc/Kconfig

@@ -454,7 +454,7 @@ config INPUT_TPS65218_PWRBUTTON
 	tristate "TPS65218 Power button driver"
 	depends on (MFD_TPS65217 || MFD_TPS65218)
 	help
-	  Say Y here if you want to enable power buttong reporting for
+	  Say Y here if you want to enable power button reporting for
 	  TPS65217 and TPS65218 Power Management IC devices.
 
 	  To compile this driver as a module, choose M here. The module will