ffmpeg: Add libva support

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

package/ffmpeg/ffmpeg.mk

@@ -41,7 +41,6 @@ FFMPEG_CONF_OPT = \
 	--enable-mdct \
 	--enable-rdft \
 	--disable-crystalhd \
-	--disable-vaapi \
 	--disable-vdpau \
 	--disable-dxva2 \
 	--enable-runtime-cpudetect \
@@ -209,6 +208,13 @@ FFMPEG_CONF_OPT += \
 	--enable-encoder=libvorbis
 endif
 
+ifeq ($(BR2_PACKAGE_LIBVA),y)
+FFMPEG_CONF_OPT += --enable-vaapi
+FFMPEG_DEPENDENCIES += libva
+else
+FFMPEG_CONF_OPT += --disable-vaapi
+endif
+
 ifeq ($(BR2_X86_CPU_HAS_MMX),y)
 FFMPEG_CONF_OPT += --enable-yasm
 FFMPEG_DEPENDENCIES += host-yasm