mfd: Kconfig: Fix some misspelling of the word functionality

Fix several variations of typo around functionali{ty,es}.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/Kconfig

@@ -1216,7 +1216,7 @@ config AB8500_CORE
 	  chip. This connects to U8500 either on the SSP/SPI bus (deprecated
 	  since hardware version v1.0) or the I2C bus via PRCMU. It also adds
 	  the irq_chip parts for handling the Mixed Signal chip events.
-	  This chip embeds various other multimedia funtionalities as well.
+	  This chip embeds various other multimedia functionalities as well.
 
 config AB8500_DEBUG
 	bool "Enable debug info via debugfs"
@@ -1866,7 +1866,7 @@ config MFD_WM8994
 	  has on board GPIO and regulator functionality which is
 	  supported via the relevant subsystems.  This driver provides
 	  core support for the WM8994, in order to use the actual
-	  functionaltiy of the device other drivers must be enabled.
+	  functionality of the device other drivers must be enabled.
 
 config MFD_WM97xx
 	tristate "Wolfson Microelectronics WM97xx"
@@ -1879,7 +1879,7 @@ config MFD_WM97xx
 	  designed for smartphone applications.  As well as audio functionality
 	  it has on board GPIO and a touchscreen functionality which is
 	  supported via the relevant subsystems.  This driver provides core
-	  support for the WM97xx, in order to use the actual functionaltiy of
+	  support for the WM97xx, in order to use the actual functionality of
 	  the device other drivers must be enabled.
 
 config MFD_STW481X
@@ -1972,7 +1972,7 @@ config MFD_STPMIC1
 	  Support for ST Microelectronics STPMIC1 PMIC. STPMIC1 has power on
 	  key, watchdog and regulator functionalities which are supported via
 	  the relevant subsystems. This driver provides core support for the
-	  STPMIC1. In order to use the actual functionaltiy of the device other
+	  STPMIC1. In order to use the actual functionality of the device other
 	  drivers must be enabled.
 
 	  To compile this driver as a module, choose M here: the