[media] cec: fix Kconfig help text

MEDIA_CEC is no longer a tristate option, so the user can't actually
choose M. Whether the code is built-in or built as a module is
decided somewhere else.

Fixes: 5bb2399a4fe4 ("[media] cec: fix Kconfig dependency problems")

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/cec/Kconfig

@@ -5,9 +5,6 @@ config MEDIA_CEC
 	---help---
 	  Enable the CEC API.
 
-	  To compile this driver as a module, choose M here: the
-	  module will be called cec.
-
 config MEDIA_CEC_DEBUG
 	bool "CEC debugfs interface (EXPERIMENTAL)"
 	depends on MEDIA_CEC && DEBUG_FS