package/mpv: disable cuda support

mpv wrongly detects cuda being available:

Checking for CUDA hwaccel : yes

leading to build errors.

Fixes
http://autobuild.buildroot.net/results/e89/e892a537265ad7259024403a0bb3ca5da85ed096/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/mpv/mpv.mk

@@ -23,6 +23,7 @@ MPV_CONF_OPTS = \
 	--disable-cdda \
 	--disable-cocoa \
 	--disable-coreaudio \
+	--disable-cuda-hwaccel \
 	--disable-libv4l2 \
 	--disable-opensles \
 	--disable-rpi \