V4L/DVB (6254): Add videobuf-vmalloc

Adds a newer videobuf-vmalloc module. This module uses the same
videobuf controls, but implements memory allocation based on vmalloc
methods.

With this method, an USB driver can use video-buf, without needing to
request memory from the DMA-safe area.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/Kconfig b/drivers/media/Kconfig
index 28ee65c..fc3ea4c 100644
--- a/drivers/media/Kconfig
+++ b/drivers/media/Kconfig
@@ -134,6 +134,10 @@
 	select VIDEOBUF_GEN
 	tristate
 
+config VIDEOBUF_VMALLOC
+	select VIDEOBUF_GEN
+	tristate
+
 config VIDEO_BUF_DVB
 	tristate