tty: serial: s/Medfile/Medfield

Fixed misspelling of 'Medfield'

Signed-off-by: Joseph Kogut <joseph.kogut@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 2b619e5..60c368a 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -489,7 +489,7 @@
 	select SERIAL_CORE
 
 config SERIAL_MFD_HSU_CONSOLE
-	bool "Medfile HSU serial console support"
+	bool "Medfield HSU serial console support"
 	depends on SERIAL_MFD_HSU=y
 	select SERIAL_CORE_CONSOLE