media: dvb: fix a Kconfig typo

drivers/media/Kconfig: typo: replace `with` with `which`
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/Kconfig

@@ -151,7 +151,7 @@ config DVB_MMAP
 	select VIDEOBUF2_VMALLOC
 	default n
 	help
-	  This option enables DVB experimental memory-mapped API, with
+	  This option enables DVB experimental memory-mapped API, which
 	  reduces the number of context switches to read DVB buffers, as
 	  the buffers can use mmap() syscalls.